Error 503/404 at Owncloud 10.5 from federated NC 22.0.3

Nextcloud version (eg, 20.0.5): 22.0.3
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.41
PHP version (eg, 7.4): 7.4.13

The issue you are facing:

User of remote Ownlcloud ca read the file list, however when trying to access it then he gehts a 503 and the server states a 404 in local logs

Is this the first time you’ve seen this error? (Y/N): Y

Steps to replicate it:

  1. share a folder via federation @
  2. receiver gets share message and adds share
  3. browse the share and access the file

The output of your Nextcloud log in Admin > Logging:

<REMOTE_IP> - <REMOTE_ID> [31/Jan/2022:08:13:47 +0100] "PROPFIND /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 207 2418 "-" "sabre-dav/4.1.0 (http://sabre.io/)"
<REMOTE_IP> - <REMOTE_ID> [31/Jan/2022:08:13:48 +0100] "GET https://cloud.r-d-w.net/public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 404 6419 "-" "ownCloud Server Crawler"
<REMOTE_IP> - <REMOTE_ID> [31/Jan/2022:08:14:00 +0100] "PROPFIND /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 207 2416 "-" "sabre-dav/4.1.0 (http://sabre.io/)"
<REMOTE_IP> - <REMOTE_ID> [31/Jan/2022:08:14:00 +0100] "GET https://cloud.r-d-w.net/public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 404 6419 "-" "ownCloud Server Crawler"
<REMOTE_IP> - <REMOTE_ID> [31/Jan/2022:08:14:10 +0100] "PROPFIND /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 207 2420 "-" "sabre-dav/4.1.0 (http://sabre.io/)"
<REMOTE_IP> - <REMOTE_ID> [31/Jan/2022:08:14:11 +0100] "GET https://cloud.r-d-w.net/public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 404 6415 "-" "ownCloud Server Crawler"

the share is: /extshare/D_und_D_Stuff/

Does anything adapted somewhere or is the NC not compatoble anymore with OC?

I found out that the sharing calls are different between OC and NC:

[31/Jan/2022:17:23:23 +0100] "PROPFIND /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 207 2420 "-" "sabre-dav/4.1.0 (http://sabre.io/)"
[31/Jan/2022:17:23:24 +0100] "GET https://cloud.r-d-w.net/public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 404 6419 "-" "ownCloud Server Crawler"
[31/Jan/2022:17:23:36 +0100] "PROPFIND /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 207 2420 "-" "sabre-dav/4.1.0 (http://sabre.io/)"
[31/Jan/2022:17:23:37 +0100] "GET https://cloud.r-d-w.net/public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 404 6413 "-" "ownCloud Server Crawler"

A Call from a different Nextclouds looks like that:

01/Feb/2022:08:31:00 +0100] "GET /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 200 9110 "-" "Nextcloud Server Crawler"
01/Feb/2022:08:31:01 +0100] "GET /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 200 9110 "-" "Nextcloud Server Crawler"
01/Feb/2022:08:31:43 +0100] "GET /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 200 9108 "-" "Nextcloud Server Crawler"
 [01/Feb/2022:08:33:34 +0100] "GET /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 200 9116 "-" "Nextcloud Server Crawler"
 [01/Feb/2022:08:33:35 +0100] "GET /public.php/webdav/Kessel_der_Welten/Kessel_der_Welten.txt HTTP/1.1" 200 9112 "-" "Nextcloud Server Crawler"

so is there a possibility to reestablish a compatibility?