Sync on windows app fails.

When I try to sync on windows app it fails with one error. I have two google calendars registered in the app and only one of them seems to sync anything. Even if I uncheck syncing of both calendars, the error still occurs, so it must be a problem with the app and not the calendar.

Details:

Newtonsoft.Json.JsonSerializationException: Unexpected end when reading JSON. Path '', line 1, position 1.