Hi,
I’ve reviewed your issue with the WebSocket and SSL certificate while using Nextcloud AIO and Nextcloud Talk. Based on your logs, it seems like the main issue is related to the SSL certificate. The log indicates a failure due to a self-signed certificate in the certificate chain, which causes the connection to the signaling server to fail. This is likely affecting the WebSocket connection as well.
I think the problem might be related to various settings, such as certificates and reverse proxy.
I’d suggest comparing your installation process with my guide for Proxmox + NGINX + Nextcloud AIO + Watchtower. This guide covers all the steps for installation, including the proper port settings, reverse proxy, and WebSocket support.
Here’s the link to my guide and URL for video (processing): Proxmox + NGINX + Nextcloud AIO + Watchtower Deployment Guide
In particular, you might want to focus on ensuring that Let’s Encrypt certificates are correctly issued (rather than using self-signed certificates), and that the reverse proxy is properly handling WebSocket connections.
I believe this could help resolve your issue, and I’m looking forward to hearing your thoughts on it.