Collabora 22.05.12 with Nextcloud 25 and 24 at standalone Ubuntu server can't open any document

Are there ANY Nextcloud that is compatible with Collabora 22.05.12 under Ubuntu 22.04 server?
I’ve tried Nextclouds from 25.0.2 to 25.0.5 and 24.0.11.
No dockers, no snaps, no appimages, standalone installation for both NC and Collabora Online. Coolwsd is configured, up and running, I can see and use Admin console. TLS=off, Termination=on, reverse proxy is configured at Apache, the link between Nextcloud and Collabora online is up and ready (from the nextcloud point of view). TLS certificates are installed by letsencrypt, NC is working perfectly.
When I try to open or create any document, I see the window that is around office ribbon and document itself, a few tries to connect to the server, and then nothing. In the console I can see the correct filename that opens, I can see that 1 file is opened, then after second or even quicker the file is closed - and I can see a few retries to open this file.
docbroker_01b ] ERR #32: Read failed, have 0 buffered bytes (ECONNRESET: Connection reset by peer)| net/Socket.hpp:1150
In apache errorlog:
[proxy_http:error] [pid 5778] (20014)Internal error (specific information not available): [client xxxx:49994] AH01102: error reading status line from remote server]
[proxy:error] [pid 5778] [client] AH00898: Error reading from remote server returned by /lool/convert-to/png
[proxy:error] [pid 1844] [client] AH00898: Timeout on 100-Continue returned by /lool/convert-to/png

Any advices? Should I check NCs richdocuments code and try to patch all /lool/ to /cool/ ?
Does anybody has working Ubuntu 22.04 standalone with NC, redis, Collabora, Apache, php 8.1?

P.S. I found coolforkit.crash file in /var/crash:
ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Sun Apr 2 01:46:02 2023
DistroRelease: Ubuntu 22.04
ExecutablePath: /usr/bin/coolforkit
ExecutableTimestamp: 1679664600
ProcCmdline: /usr/bin/coolforkit --systemplate=/opt/cool/systemplate --lotemplate=/opt/collaboraoffice --childroot=/opt/cool/child-roots/ –
ProcEnviron: Error: [Errno 13] Permission denied: ‘environ’
ProcMaps: Error: [Errno 13] Permission denied: ‘maps’
Name: kitbroker_00d

P.S. Are there any mirror of Collabora/Code server of version 21.xx? How to dowgrade to previous (it seems working) version?