Problems after updating Proxmox PVE8 to PVE9

[J-Paul0815]

After updating Proxmox PVE 8 to PVE 9, wiki.js no longer works. I backed up the LXC and restored it on a PVE 8, there it is running.
Therefore, I assume it's due to the switch to Debian Trixie.
LXC unprivilidged, Keyctl, Nesting yes, with Docker-compose
would be grateful for any advice
wiki_1 | Loading configuration from /wiki/config.yml... OK wiki_1 | 2025-10-09T06:28:22.925Z [MASTER] info: ======================================= wiki_1 | 2025-10-09T06:28:22.933Z [MASTER] info: = Wiki.js 2.5.299 ===================== wiki_1 | 2025-10-09T06:28:22.935Z [MASTER] info: ======================================= wiki_1 | 2025-10-09T06:28:22.938Z [MASTER] info: Initializing... wiki_1 | 2025-10-09T06:28:25.316Z [MASTER] info: Using database driver pg for postgres [ OK ] wiki_1 | 2025-10-09T06:28:25.364Z [MASTER] info: Connecting to database... wiki_1 | 2025-10-09T06:28:25.394Z [MASTER] error: Database Connection Error: EACCES undefined:undefined wiki_1 | 2025-10-09T06:28:25.395Z [MASTER] warn: Will retry in 3 seconds... [Attempt 1 of 10] wiki_1 | 2025-10-09T06:28:28.403Z [MASTER] info: Connecting to database... wiki_1 | 2025-10-09T06:28:28.407Z [MASTER] error: Database Connection Error: EACCES undefined:undefined wiki_1 | 2025-10-09T06:28:28.410Z [MASTER] warn: Will retry in 3 seconds... [Attempt 2 of 10] wiki_1 | 2025-10-09T06:28:31.413Z [MASTER] info: Connecting to database... wiki_1 | 2025-10-09T06:28:31.418Z [MASTER] error: Database Connection Error: EACCES undefined:undefined wiki_1 | 2025-10-09T06:28:31.421Z [MASTER] warn: Will retry in 3 seconds... [Attempt 3 of 10] wiki_1 | 2025-10-09T06:28:34.426Z [MASTER] info: Connecting to database... wiki_1 | 2025-10-09T06:28:34.430Z [MASTER] error: Database Connection Error: EACCES undefined:undefined wiki_1 | 2025-10-09T06:28:34.431Z [MASTER] warn: Will retry in 3 seconds... [Attempt 4 of 10] wiki_1 | 2025-10-09T06:28:37.438Z [MASTER] info: Connecting to database... wiki_1 | 2025-10-09T06:28:37.447Z [MASTER] error: Database Connection Error: EACCES undefined:undefined wiki_1 | 2025-10-09T06:28:37.447Z [MASTER] warn: Will retry in 3 seconds... [Attempt 5 of 10] wiki_1 | 2025-10-09T06:28:40.450Z [MASTER] info: Connecting to database...

[fnafox]

Look at the logs, it's unable to connect to the database. Check if your database is available and routable from the wiki container. It's hard to say anything more based on the provided information.