[Bug]: When i try to process an event i get error Parse error: Invalid Mimedir file about server

[section1]

I add this FIX to NC version 28.0.6 and fix the problem with accepting an event with an underscore(_) ....and too tested using the import function in thunderbird and web calendar app and works perfectly.
Question: is a config option to enable OPTION_FORGIVING that i am missing ?

[Pofilo]

I had quite the same issue but the fix is not working for me.
However, I don't know how to figure out which event is a problem.
Everything in logs is blanked because considered as "sensitive data", how do you know which event is the source of the problem ?

I have the log every single time the calendar is synced (not when I try to accept an invitation):

UnsupportedMediaType This resource only supports valid iCalendar 2.0 data. Parse error: Invalid Mimedir file. Line starting at 30 did not follow iCalendar/vCard conventions

[section1]

@Pofilo check you access logs to see if you found a 5xx error (nginx/apache) and should show the ID of the meeting. example:
DELETE /remote.php/dav/calendars/USER/personal/dea11afd-2804-1bd3-9b98-35f529fcc528.ics HTTP/1.1" 500 ....

[Pofilo]

Thank you, I did not even think about that.
It's only 401 or 415 errors but I managed to find one ics file.