diff --git a/src/components/ActiveCarpools/ActiveCarpools.tsx b/src/components/ActiveCarpools/ActiveCarpools.tsx
index e4f26ae..db30079 100644
--- a/src/components/ActiveCarpools/ActiveCarpools.tsx
+++ b/src/components/ActiveCarpools/ActiveCarpools.tsx
@@ -17,7 +17,7 @@ export default function ActiveCarpools() {
 	const [activeCarpools, setActiveCarpools] = useState<ICarpool[]>([]);
 
 	useEffect(() => {
-		getActiveCarpools().then(setActiveCarpools);
+		getActiveCarpools().then(setActiveCarpools).catch(console.error); // TODO error handling
 	}, []);
 
 	return (
@@ -30,9 +30,11 @@ export default function ActiveCarpools() {
 		>
 			<h1 style={{ textAlign: 'center' }}>Carpools</h1>
 			<UISecondaryBox style={{ width: '100%', boxSizing: 'border-box' }}>
-				{activeCarpools.length > 0 ? activeCarpools.map((carpool) => (
-					<ActiveCarpoolListItem carpool={carpool} key={carpool.id} />
-				)) : "No Carpools"}
+				{activeCarpools.length > 0
+					? activeCarpools.map((carpool) => (
+							<ActiveCarpoolListItem carpool={carpool} key={carpool.id} />
+					  ))
+					: 'No Carpools'}
 			</UISecondaryBox>
 		</div>
 	);
diff --git a/src/components/ActiveEvents/Events.tsx b/src/components/ActiveEvents/Events.tsx
index c279f89..35069bc 100644
--- a/src/components/ActiveEvents/Events.tsx
+++ b/src/components/ActiveEvents/Events.tsx
@@ -11,7 +11,7 @@ export default function ActiveEvents() {
 
 	useEffect(() => {
 		if (!hasEvents) {
-			getActiveEvents().then(setEvents);
+			getActiveEvents().then(setEvents).catch(console.error); // TODO error handling
 		}
 	}, [hasEvents, setEvents]);
 
diff --git a/src/components/Authentication/AuthenticationWrapper.tsx b/src/components/Authentication/AuthenticationWrapper.tsx
index a550550..44d886c 100644
--- a/src/components/Authentication/AuthenticationWrapper.tsx
+++ b/src/components/Authentication/AuthenticationWrapper.tsx
@@ -15,15 +15,19 @@ export default function AuthenticationWrapper({
 			const sessionToken = localStorage.getItem('session_token');
 
 			if (sessionToken) {
-				const user = await getMe();
-				if (!('status' in user && user.status === 'error')) {
-					setUser(user);
-					return;
+				try {
+					setUser(await getMe());
+				} catch (e) {
+					console.error(e);
+					setUser(null);
 				}
+			} else {
+				setUser(null);
 			}
-			setUser(null);
 		}
-		refresh_().finally(() => setLoaded(true));
+		refresh_()
+			.catch(console.error) // TODO error handling
+			.finally(() => setLoaded(true));
 	}, []);
 
 	useEffect(refresh, [refresh]);
diff --git a/src/components/Authentication/Authenticator.tsx b/src/components/Authentication/Authenticator.tsx
index 677b9c4..ddebc1a 100644
--- a/src/components/Authentication/Authenticator.tsx
+++ b/src/components/Authentication/Authenticator.tsx
@@ -33,6 +33,7 @@ function useToken(
 				.then(({ token }) => {
 					setToken(token ?? null);
 				})
+				.catch(console.error) // TODO error handling
 				.finally(() => setPending(false));
 		}
 	}, [code, provider]);
diff --git a/src/components/Carpool/Carpool.tsx b/src/components/Carpool/Carpool.tsx
index ff9ee22..2cc279c 100644
--- a/src/components/Carpool/Carpool.tsx
+++ b/src/components/Carpool/Carpool.tsx
@@ -58,20 +58,22 @@ export default function Carpool({ id }: { id: number }) {
 	);
 
 	useEffect(() => {
-		getCarpool(id).then((carpool) => {
-			const invitationsMap: Record<number, ICarpool['invitations'][0]> = {};
-			carpool.invitations.forEach((invite) => {
-				invitationsMap[invite.user.id] = invite;
-			});
-			setCarpool({
-				id: carpool.id,
-				name: carpool.name,
-				event: carpool.event,
-				members: carpool.members,
-				creatorId: carpool.creatorId,
-				invitations: invitationsMap,
-			});
-		});
+		getCarpool(id)
+			.then((carpool) => {
+				const invitationsMap: Record<number, ICarpool['invitations'][0]> = {};
+				carpool.invitations.forEach((invite) => {
+					invitationsMap[invite.user.id] = invite;
+				});
+				setCarpool({
+					id: carpool.id,
+					name: carpool.name,
+					event: carpool.event,
+					members: carpool.members,
+					creatorId: carpool.creatorId,
+					invitations: invitationsMap,
+				});
+			})
+			.catch(console.error); // TODO error handling
 	}, [id, setCarpool]);
 
 	const acceptRequest = useCallback(
diff --git a/src/components/Carpool/CarpoolTopButtonsNonMembersOnly.tsx b/src/components/Carpool/CarpoolTopButtonsNonMembersOnly.tsx
index d828e33..71a8f77 100644
--- a/src/components/Carpool/CarpoolTopButtonsNonMembersOnly.tsx
+++ b/src/components/Carpool/CarpoolTopButtonsNonMembersOnly.tsx
@@ -27,7 +27,7 @@ export default function CarpoolTopButtonsNonMembersOnly() {
 	const me = useMe() || defaultMe;
 
 	const sendRequest = useCallback(() => {
-		sendCarpoolRequest(carpool.id);
+		sendCarpoolRequest(carpool.id); // TODO carpool request error handling
 	}, [carpool.id, sendCarpoolRequest]);
 
 	const cancelRequest = useCallback(() => {
@@ -35,15 +35,19 @@ export default function CarpoolTopButtonsNonMembersOnly() {
 	}, [carpool.id, cancelCarpoolRequest]);
 
 	const acceptInvitation = useCallback(() => {
-		acceptCarpoolInvite(carpool.id).then(() => {
-			members.push(me);
-		});
+		acceptCarpoolInvite(carpool.id)
+			.then(() => {
+				members.push(me);
+			})
+			.catch(console.error); // TODO error handling
 	}, [acceptCarpoolInvite, carpool.id, members, me]);
 
 	const denyInvitation = useCallback(() => {
-		denyCarpoolInvite(carpool.id).then(() => {
-			members.push(me);
-		});
+		denyCarpoolInvite(carpool.id)
+			.then(() => {
+				members.push(me);
+			})
+			.catch(console.error); // TODO error handling
 	}, [carpool.id, denyCarpoolInvite, me, members]);
 
 	const invitationState = useInvitationState(carpool.id);
diff --git a/src/components/Carpool/InvitationList.tsx b/src/components/Carpool/InvitationList.tsx
index 103d278..03a197c 100644
--- a/src/components/Carpool/InvitationList.tsx
+++ b/src/components/Carpool/InvitationList.tsx
@@ -46,7 +46,9 @@ export default function InvitationList() {
 		useImmutable<PotentialInvitee[] | null>(null);
 
 	useEffect(() => {
-		getPotentialInvitees(carpool.id).then(setAvailableSignups);
+		getPotentialInvitees(carpool.id)
+			.then(setAvailableSignups)
+			.catch(console.error); // TODO error handling
 	}, [carpool.id, setAvailableSignups]);
 
 	const invitedUserIDs = useMemo(
diff --git a/src/components/Carpool/useSignups.tsx b/src/components/Carpool/useSignups.tsx
index 925e7ef..a75d223 100644
--- a/src/components/Carpool/useSignups.tsx
+++ b/src/components/Carpool/useSignups.tsx
@@ -8,9 +8,7 @@ export default function useSignups(eventId: number, userIds: number[]) {
 	const [signups, setSignups] = useState<IEventSignup[]>([]);
 
 	useEffect(() => {
-		getEventSignupsBulk(eventId, userIds).then((signups) => {
-			setSignups(signups);
-		});
+		getEventSignupsBulk(eventId, userIds).then(setSignups).catch(console.error); // TODO error handling
 	}, [eventId, userIds]);
 
 	return signups;
diff --git a/src/components/Event/Event.tsx b/src/components/Event/Event.tsx
index 8d9cfd2..1f8311b 100644
--- a/src/components/Event/Event.tsx
+++ b/src/components/Event/Event.tsx
@@ -21,6 +21,7 @@ export default function Event({
 		setLoading(true);
 		getEvent(id)
 			.then((e) => e && setEvent(e))
+			.catch(console.error) // TODO error handling
 			.finally(() => setLoading(false));
 	}, [id, setEvent]);
 
diff --git a/src/components/EventCreator/EventCreator.tsx b/src/components/EventCreator/EventCreator.tsx
index 5a0be7e..48f7a87 100644
--- a/src/components/EventCreator/EventCreator.tsx
+++ b/src/components/EventCreator/EventCreator.tsx
@@ -70,6 +70,7 @@ export default function EventCreator({ group }: { group: IGroup }) {
 				.then(({ id }) => {
 					setCreatedEventId(id);
 				})
+				.catch(console.error) // TODO error handling
 				.finally(() => setCreating(false));
 		}
 	}, [
diff --git a/src/components/Group/Group.tsx b/src/components/Group/Group.tsx
index 4ece291..7496ab9 100644
--- a/src/components/Group/Group.tsx
+++ b/src/components/Group/Group.tsx
@@ -30,14 +30,8 @@ export default function Group({ id }: { id: number }) {
 	useEffect(() => {
 		setLoading(true);
 		getGroup(id)
-			.then((group) => {
-				// @ts-ignore
-				if ('status' in group && group.status === 'error') {
-					setGroup(null);
-				} else {
-					setGroup(group);
-				}
-			})
+			.then(setGroup)
+			.catch(console.error) // TODO error handling
 			.finally(() => setLoading(false));
 	}, [id, setGroup]);
 
diff --git a/src/components/Group/GroupInviteCode.tsx b/src/components/Group/GroupInviteCode.tsx
index 250f9f9..f425bc0 100644
--- a/src/components/Group/GroupInviteCode.tsx
+++ b/src/components/Group/GroupInviteCode.tsx
@@ -19,15 +19,19 @@ export default function GroupInviteCode() {
 	const [shown, setShown] = useState(false);
 
 	const generateJoinCode = useCallback(() => {
-		generateCode(group.id).then((code) => {
-			group.joinCode = code;
-		});
+		generateCode(group.id)
+			.then((code) => {
+				group.joinCode = code;
+			})
+			.catch(console.error); // TODO error handling
 	}, [group]);
 
 	const resetJoinCode = useCallback(() => {
-		resetCode(group.id).then((code) => {
-			group.joinCode = null;
-		});
+		resetCode(group.id)
+			.then((code) => {
+				group.joinCode = null;
+			})
+			.catch(console.error); // TODO error handling
 	}, [group]);
 
 	if (group.joinCode) {
diff --git a/src/components/Group/GroupMembersLink.tsx b/src/components/Group/GroupMembersLink.tsx
index bf5ed4d..eca4dec 100644
--- a/src/components/Group/GroupMembersLink.tsx
+++ b/src/components/Group/GroupMembersLink.tsx
@@ -22,11 +22,13 @@ export default function GroupMembersLink() {
 
 	const addAdmin = useCallback(
 		(adminId: number, adminName: string) => {
-			addGroupAdmin(group.id, adminId).then(({ status }) => {
-				if (status === 'success') {
-					group.admins.push({ id: adminId, name: adminName });
-				}
-			});
+			addGroupAdmin(group.id, adminId)
+				.then(({ status }) => {
+					if (status === 'success') {
+						group.admins.push({ id: adminId, name: adminName });
+					}
+				})
+				.catch(console.error); // TODO error handling
 		},
 		[group.admins, group.id]
 	);
@@ -35,11 +37,13 @@ export default function GroupMembersLink() {
 
 	const removeAdmin = useCallback(
 		(adminId: number) => {
-			removeGroupAdmin(group.id, adminId).then((res) => {
-				if (res.status === 'success') {
-					group.admins = group.admins.filter((admin) => admin.id !== adminId);
-				}
-			});
+			removeGroupAdmin(group.id, adminId)
+				.then((res) => {
+					if (res.status === 'success') {
+						group.admins = group.admins.filter((admin) => admin.id !== adminId);
+					}
+				})
+				.catch(console.error); // TODO error handling
 		},
 		[group]
 	);
diff --git a/src/components/Group/GroupSettings.tsx b/src/components/Group/GroupSettings.tsx
index e230333..081a8ab 100644
--- a/src/components/Group/GroupSettings.tsx
+++ b/src/components/Group/GroupSettings.tsx
@@ -16,9 +16,7 @@ export default function GroupSettings({ group }: { group: IGroup }) {
 			.then(({ status }) => {
 				setDeletionSuccessful(status === 'success');
 			})
-			.catch(() => {
-				setDeletionSuccessful(false);
-			});
+			.catch(() => setDeletionSuccessful(false));
 	}, [group.id]);
 
 	const confirmDeletion = useCallback(() => {
diff --git a/src/components/GroupCreator/GroupCreator.tsx b/src/components/GroupCreator/GroupCreator.tsx
index b75026e..47f7eea 100644
--- a/src/components/GroupCreator/GroupCreator.tsx
+++ b/src/components/GroupCreator/GroupCreator.tsx
@@ -19,6 +19,7 @@ export default function GroupCreator() {
 					setCreationSuccessful(true);
 					setCreatedGroupId(id);
 				})
+				.catch(console.error) // TODO error handling
 				.finally(() => {
 					setCreating(false);
 				});
diff --git a/src/components/GroupJoinerLink.tsx b/src/components/GroupJoinerLink.tsx
index 9553037..3eb0a64 100644
--- a/src/components/GroupJoinerLink.tsx
+++ b/src/components/GroupJoinerLink.tsx
@@ -19,11 +19,13 @@ export function GroupJoiner() {
 	useEffect(() => {
 		if (code) {
 			const initialCode = code;
-			resolveCode(code).then((group) => {
-				if (code === initialCode) {
-					setGroup(group);
-				}
-			});
+			resolveCode(code)
+				.then((group) => {
+					if (code === initialCode) {
+						setGroup(group);
+					}
+				})
+				.catch(console.error);
 		}
 	}, [code]);
 
@@ -38,6 +40,7 @@ export function GroupJoiner() {
 						window.location.href = '/groups/' + id;
 					}
 				})
+				.catch(console.error)
 				.finally(() => setJoining(false));
 		}
 	}, [code, group?.id]);
diff --git a/src/components/GroupSharedLinkResolver.tsx b/src/components/GroupSharedLinkResolver.tsx
index d60c4ba..47f996f 100644
--- a/src/components/GroupSharedLinkResolver.tsx
+++ b/src/components/GroupSharedLinkResolver.tsx
@@ -15,6 +15,7 @@ export default function GroupSharedLinkResolver() {
 		setResolving(true);
 		resolveCode(code)
 			.then(setGroup)
+			.catch(console.error)
 			.finally(() => setResolving(false));
 	}, [code]);
 
@@ -29,6 +30,7 @@ export default function GroupSharedLinkResolver() {
 						window.location.href = '/groups/' + id;
 					}
 				})
+				.catch(console.error)
 				.finally(() => setJoining(false));
 		}
 	}, [code, group?.id]);
diff --git a/src/components/Groups/Groups.tsx b/src/components/Groups/Groups.tsx
index 4325511..8a6e21a 100644
--- a/src/components/Groups/Groups.tsx
+++ b/src/components/Groups/Groups.tsx
@@ -9,7 +9,7 @@ export default function Groups() {
 	const [groups, setGroups] = useState<IGroup[]>([]);
 
 	useEffect(() => {
-		getGroups().then(setGroups);
+		getGroups().then(setGroups).catch(console.error); // TODO error handling
 	}, []);
 
 	return (
diff --git a/src/components/UI/UIPlacesAutocomplete.tsx b/src/components/UI/UIPlacesAutocomplete.tsx
index 4be8dde..6f9d62a 100644
--- a/src/components/UI/UIPlacesAutocomplete.tsx
+++ b/src/components/UI/UIPlacesAutocomplete.tsx
@@ -60,13 +60,15 @@ export default function UIPlacesAutocomplete({
 
 	useEffect(() => {
 		if (placeId) {
-			getPlaceDetails(placeId).then((result) => {
-				if (result.formattedAddress.startsWith(result.name)) {
-					setLocation(result.formattedAddress);
-				} else {
-					setLocation(`${result.name}, ${result.formattedAddress}`);
-				}
-			});
+			getPlaceDetails(placeId)
+				.then((result) => {
+					if (result.formattedAddress.startsWith(result.name)) {
+						setLocation(result.formattedAddress);
+					} else {
+						setLocation(`${result.name}, ${result.formattedAddress}`);
+					}
+				})
+				.catch(console.error); // TODO error handling
 		}
 	}, [placeId]);
 
diff --git a/src/components/api.ts b/src/components/api.ts
index 4d5d481..80a59ee 100644
--- a/src/components/api.ts
+++ b/src/components/api.ts
@@ -23,6 +23,9 @@ async function post(path: string, data: any) {
 			'Content-Type': 'application/json',
 		},
 	});
+	if (res.status !== 200) {
+		throw new Error(`${path}: ${await res.text()}`);
+	}
 	return await res.json();
 }
 
@@ -35,6 +38,9 @@ async function delete$(path: string, body?: any) {
 		},
 		body: body ? JSON.stringify(body) : undefined,
 	});
+	if (res.status !== 200) {
+		throw new Error(`${path}: ${await res.text()}`);
+	}
 	return await res.json();
 }
 
@@ -45,12 +51,10 @@ async function get(path: string) {
 		},
 	});
 	const result = await res.json();
+	if (res.status !== 200) {
+		throw new Error(`${path}: ${await res.text()}`);
+	}
 	return result;
-	// if (res.ok) {
-	// 	return result;
-	// } else {
-	// 	throw new Error(result.message);
-	// }
 }
 
 export async function getEventSignupsBulk(
diff --git a/src/components/hooks.ts b/src/components/hooks.ts
index d4ba820..47768a9 100644
--- a/src/components/hooks.ts
+++ b/src/components/hooks.ts
@@ -10,7 +10,9 @@ export function useNotifications() {
 	const [notifications, setNotifications] = useState<IInvitation[]>([]);
 
 	const refresh = useCallback(() => {
-		getReceivedInvitationsAndRequests().then(setNotifications);
+		getReceivedInvitationsAndRequests()
+			.then(setNotifications)
+			.catch(console.error); // TODO error handling
 	}, []);
 
 	useEffect(refresh, [refresh]);
diff --git a/src/components/usePlace.ts b/src/components/usePlace.ts
index dfa5f28..2b857e7 100644
--- a/src/components/usePlace.ts
+++ b/src/components/usePlace.ts
@@ -9,7 +9,7 @@ export default function usePlace(placeId: string | null) {
 		if (placeId == null) {
 			setPlaceDetails(null);
 		} else {
-			getPlaceDetails(placeId).then(setPlaceDetails);
+			getPlaceDetails(placeId).then(setPlaceDetails).catch(console.error); // TODO error handling
 		}
 	}, [placeId]);
 
diff --git a/src/state/Notifications/NotificationsProvider.tsx b/src/state/Notifications/NotificationsProvider.tsx
index 7afe2b0..a8eb526 100644
--- a/src/state/Notifications/NotificationsProvider.tsx
+++ b/src/state/Notifications/NotificationsProvider.tsx
@@ -33,20 +33,23 @@ export default function NotificationsProvider({
 	>({});
 
 	useEffect(() => {
-		api.getSentRequestsAndInvites().then((invitations) => {
-			const invited = {} as Record<number, boolean>;
-			const requested = {} as Record<number, boolean>;
-			for (let invitation of invitations) {
-				if (invitation.isRequest) {
-					invited[invitation.carpool.id] = true;
-				} else {
-					requested[invitation.carpool.id] = true;
+		api
+			.getSentRequestsAndInvites()
+			.then((invitations) => {
+				const invited = {} as Record<number, boolean>;
+				const requested = {} as Record<number, boolean>;
+				for (let invitation of invitations) {
+					if (invitation.isRequest) {
+						invited[invitation.carpool.id] = true;
+					} else {
+						requested[invitation.carpool.id] = true;
+					}
 				}
-			}
 
-			setInvitedCarpoolIds(invited);
-			setRequestedCarpoolIds(requested);
-		});
+				setInvitedCarpoolIds(invited);
+				setRequestedCarpoolIds(requested);
+			})
+			.catch(console.error); // TODO error handling
 	}, [setInvitedCarpoolIds, setRequestedCarpoolIds]);
 
 	const sendCarpoolRequest = useCallback(