Sync Problem with DAVx5


for some time now I get errors during synchronisation my android with nextcloud calendar. On android I use DAVx5 and in DAVx5 I will get HTTP 500 error. If I try to connect with a browser to the server url I will be work?
I installed the latest version 19 on my server.

I can found this messages in the logfiles:

[Mon Jul 06 17:46:35.280449 2020] [core:error] [pid 25323] [client ] End of script output before headers: remote.php
[Mon Jul 06 17:46:36.673769 2020] [fcgid:warn] [pid 25078] (104)Connection reset by peer: [client ] mod_fcgid: error reading data from FastCGI server
[Mon Jul 06 17:46:36.673854 2020] [core:error] [pid 25078] [client ] End of script output before headers: remote.php

Can anyone help me?

Thank you for your help.

If you’ve got problems using DAVx5 I would recommend to check its support forum and FAQ first. There you will find a description about how to debug such problems too. On your Nextcloud server you should check the Nextcloud log file for any related error messages: