DAVx5 and EGW - syncronisation error

[Odeeno]

Hi all,
maybe some one can help me. Till some times I can update my phone calendar with EGW calendar using CalDAV and the DAVx5 app (for Android).
After an update I cant and I get this error in DAVx5 debug log: "EXCEPTION at.bitfire.dav4jvm.exception.DavException: Received multi-get response without address data"
I use EGW version 21.1.20220207 and DAVx5 version 4.1.1
I can download the ics/the resource file via browser https://domain/egroupware/groupdav.php/user/calendar/1111.ics but the downloaded file is empty.

I read this thread, now I change the delete setting as only administrators can delete the item, I definitively delete via web interface all “canceled” dates, but I still have the problem.

DAVx - EGW liefert bei Abfrage eines Termins mit Wiederholung eine leere Datei

I also deleted a record in the database, but now there is another .ics empty
I don’t know how many files are empty, I cant delete all manually one by one and I’m afraid I’ll make a mistake.

Is there a solution? Thank you.

[RalfBecker]

After an update I cant and I get this error in DAVx5 debug log: “EXCEPTION at.bitfire.dav4jvm.exception.DavException: Received multi-get response without address data”

address-data sounds wired, either a mistake in the error-message or you are syncing addresses …

Anyway, to help you, you need to enable the CalDAV/CardDAV logging and reproduce the error:
Avatar (top right icon) >> Preferences >> CalDAV/CardDAV Sync >> Logging / Debuging >> Enable logging: Requests and full responses to files directory

Would also make sense to tail the error_log while you reproduce the problem:

/etc/egroupware-docker/egroupware-logs.sh

Ralf

[Odeeno]

Thank you Ralf.
Nothing related to CalDAV.
I get that error on my phone, but nothing on the error log.
Only this, but it appear not relevant
[error] 22#22: *16917 upstream prematurely closed FastCGI request while reading upstream, client: 172.20.0.1, server: _, request: “GET /egroupware/api/avatar.php?contact_id=6&lavatar=&etag=16 HTTP/1.1”, upstream: “fastcgi://172.20.0.5:9000”, host: “mydomain”, referrer: “https://mydomain/egroupware/index.php?cd=yes”

[Odeeno]

Maybe useful
This is a row of egw_cal table of an event that appear empty if open via browser https://domain/egroupware/groupdav.php/user/calendar/1564.ics

“cal_id”,“cal_uid”,“cal_owner”,“cal_category”,“cal_modified”,“cal_priority”,“cal_public”,“cal_title”,“cal_description”,“cal_location”,“cal_reference”,“cal_modifier”,“cal_non_blocking”,“cal_special”,“cal_etag”,“cal_creator”,“cal_created”,“cal_recurrence”,“tz_id”,“cal_deleted”,“caldav_name”,“range_start”,“range_end"
1564,calendar-1564-569b73cfb40fd8345c599f6e6ab1c54b,8,“36”,1647331292,2,1,TITLE,“DESCRIPTION”,”",0,8,1,0,2,8,1518623777,0,350,“1564.ics”,1581807600,

cal_delete is [NULL]