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Fixing task sync problems

If the task sync doesn’t work and you get an error during the sync like this:

Task sync error

Then do the following to fix the problem:
  1. Open "Settings", "Debug Tools", "Changed tasks to upload". The tasks that you can see there couldn’t be uploaded to Google yet. Please write them down and enter these changes again after the sync works correctly again (or just enter them directly on http://calendar.google.com ).
  2. Open "Settings", "Tasks", tap on "Convert to OAuth2" and follow the instructions to fix the sync problem: