Multiple lines read as text in /DecSync/calendars error

[MarioRossiGithub]

Hi! I create events with Tasks (Tasks.org) and synchronize them with decsync. However, for the past few days I have been constantly getting this error notification "Multiple lines read as text in /DecSync/calendars/...". If I try to delete it (by swiping), it reappears after a few minutes, it's really annoying. I would like to try to fix the problem but I don't understand what the error is.

[kannes]

Same here since ~1 week.

The message is longer than the notification thing can display and there is no way to expand it.