How to locate faulty ics resource

[j-schneid]

Hello,
I'm using DAVx5 to connect my Android phone's calendar with that on my Nextcloud. After I reset my phone and had my phone's DAVx5 download all calendar events anew, it reports an error. In debug-info.txt I find:
Caused by: net.fortuna.ical4j.data.ParserException: Error at line 17:Text cannot be parsed to a Duration
And
REMOTE RESOURCE https://www.dummyservername.info/nc/remote.php/dav/calendars/admin/neu-2021/6d39b248-d3b1-4235-87f5-6ec25ac2bb25.ics

So my question is: How can I locate the resource that causes the problem? The path cited is something I can not relate to as a file.
Is there anything to look for in the debug-info.txt or in the logcat.txt that could give me a hint?

Phone: Android 11 (update March 1, 2024)
DAVx5: 4.3.15-ose
Nextcloud Hub 3 25.0.13 with Calendar 4.5.2

Any useful hint for a non-expert?
Best regards
Joachim

[rfc2822]

The logs should show everything, but you can also download the remote resource with a browser (same credentials as in DAVx5)

[j-schneid]

Thank you for the hint - actually, I could have tried. To me as a layman, the URL with "remote.php" in it didn't look like a proper URL because I don't have a clue of how PHP works. But it works, and I could download the faulty resource and find out at what date in my calendar I can find it. Although I didn't find an actual error in it, simply opening it, changing some detail and saving it resulted in my calendar program writing a correct entry and now the entry is correctly synced.