Error Messages Explained

A reference of the error messages you may run into across OneCal, what each one means, and how to fix it.

Calendar sync errors

Hover over the Error or Paused status on the Calendar Sync page to see which of these applies and which calendar is affected, and the calendar itself shows a tag such as Not found or No access in Settings → Calendars. See Calendar status tags. The AI assistant can also explain a failed sync and tell you whether re-running it helps.

When OneCal pauses a calendar sync because of a problem with one of its calendars, it emails you at most once per calendar per day, even if several calendar syncs use the same calendar. Temporary problems at the calendar provider, such as a provider limiting requests, never pause your calendar syncs.

"OneCal could not find the calendar"

OneCal could not find one of the sync's calendars in the connected account. This usually means the calendar or its account was deleted at the calendar provider. OneCal pauses the calendar sync and emails you. Re-running or un-pausing the sync does not fix this.

If the calendar or the account was deleted, delete the syncs that use this calendar and remove the calendar from OneCal.

If the calendar still exists, follow these steps:

Delete all syncs that use this calendar.
Remove the calendar from OneCal.
Connect the same calendar again.
Re-create the sync.

If the problem persists, contact our support team. See also Manage Your Syncs and Rename, Recolor and Remove Calendars.

"OneCal no longer has permission to access"

The connected account lost write access to one of the sync's calendars, for example because a shared calendar was changed to view only. OneCal pauses the calendar sync and emails you. Restore the permission at the calendar provider and un-pause the sync, or use Edit Calendars in the sync's menu to pick another calendar, which resumes the sync.

"The account is not available for calendar sync"

The calendar account behind one of the sync's calendars cannot be used for calendars right now. Common causes are a Google Workspace or Microsoft 365 administrator blocking OneCal, the Calendar service being disabled for the account, or an inactive, full or on-premises mailbox. OneCal pauses the calendar sync and emails you. Ask your administrator to allow OneCal and un-pause the sync, or use Edit Calendars in the sync's menu to pick a calendar from another account, which resumes the sync.

The calendar provider refused OneCal's credentials for one run and the sync was not paused. This is usually a one-off. Re-run the sync. If it keeps failing, refresh the calendar connection. See Fix an Expired Calendar Connection. When a connection has really expired, OneCal pauses the sync, emails you, and the calendar card shows a Connection expired tag with a Reconnect action instead.

"Temporarily limiting requests" and "temporarily unavailable"

The calendar provider throttled OneCal or returned a server error. These errors clear on their own. OneCal waits before trying again automatically; the calendar sync shows Retry Scheduled and its tooltip names the time of the next attempt. Re-run the sync to try right away. If the error keeps repeating for a long time, OneCal pauses the calendar sync; un-pause it once the provider has recovered. If the same error keeps coming back, contact our support team.

"Reset its change tracking"

The calendar provider discarded the token OneCal uses to detect changes. This is not a real failure. The next run is a full sync and repairs it. Re-run the sync to fix it right away.

"Reported a conflict" and "rejected a request"

The calendar provider refused a single write, usually because the same event was saved twice at the same time, or because an event could not be converted for the destination calendar. Re-run the sync. If it keeps failing, contact our support team with the name of the sync.

"An error occurred while syncing"

The failure could not be classified. Re-run the sync. If it keeps failing, contact our support team with the name of the sync.

"Calendar Pair Already in Sync"

You selected a calendar pair that another calendar sync already syncs in the same direction. Proceeding can create multiple clone events for the same original event. Change the selection, or delete the other calendar sync first. See the callout on the Calendar Sync intro.

Calendar connection errors

"Connection not complete"

A permission checkbox was not selected during the Google or Microsoft consent screen. Refresh the calendar connection with Refresh connection on the calendar card, and select every permission when prompted. See I Can't Connect My Calendar.

"This account has already been used in a free trial"

The calendar account was already used to start a free trial on another OneCal account. Contact our support team if you need the calendar account moved to your current team.

"This account is already registered by a different user"

The calendar account is already connected to a different OneCal account. Disconnect the calendar account from that OneCal account first, or contact our support team if you don't have access to it.

"Invalid Apple email or app-specific password"

Use an app-specific password created for OneCal, not your Apple account password. See Create an Apple ID app-specific password.

"Read-only calendars cannot be selected as targets"

You have view-only access to this calendar, so OneCal cannot create events on it. Read-only calendars can be used as sources of a calendar sync, and to read availability, but not as targets of a calendar sync or as the booking calendar of a booking link.

"This calendar is being used in one or more sync configs / booking links / your booking page"

You are trying to remove a calendar that other parts of OneCal still depend on. Before the calendar can be removed, update or delete every calendar sync that uses it, and every booking link that adds events to it or reads availability from it, including the booking links listed on your booking page. See Rename, Recolor and Remove Calendars.

Booking errors

"Booking link not found" and "This booking link is turned off"

Booking link not found means the booking link was deleted or its URL changed. This booking link is turned off means the host disabled the link, or all booking links were disabled because the team's free trial or subscription expired. See Schedulers Can't Book Time With You.

"This time slot is no longer available"

The slot was taken or became unavailable between the moment the page loaded and the moment the scheduler confirmed. The scheduler can simply pick another time.

"This private link has expired"

The private link reached its expiry date or its booking limit. Generate a new private link and share it again. See Private Booking Links.

"This booking page is turned off"

The owner turned their booking page off under Settings → Booking Page. Their individual booking links may still work, so ask them for a direct link.

The magic link was already used or expired. Request a new one. See I Can't Sign In.

Too many sign-in requests in a short time. Wait a few minutes and use the most recent email.

"Failed to link account"

The email address already has a OneCal account that uses a different sign-in method. Sign in with the original method, then add more login methods from Settings. See Login Methods.

"We couldn't sign you in with that provider"

The Google, Microsoft or Apple sign-in was cancelled or failed. Try again, or use another sign-in method. See I Can't Sign In.

Team invite errors

"This invite is no longer valid"

The invitation expired, was cancelled, or was sent to a different email address than the one you signed in with. Invitations last 90 days. Ask the person who invited you to resend it. See Resend Invitation.

If you hit an error that is not listed here, contact our support team with a screenshot and what you were doing when it appeared.