Hi Amane,
Apologies for the late response, but I was not able to get the diagnostics, that is until today. With the help of Spaceinvader, I also rebooted the GUI through SSH and that didn't seem to help either.
However, today I was somehow able to access the GUI through Tailscale on my phone. On my other devices I was still unable to gain access.
I have upgraded the server to 6.12.9, but even with updated version the issue still persists. On my other devices I am unable to access the GUI through the local IP address route. Other applications & dockers are still accessible, including my network drives.
Before I upgraded, I managed to turn on remote management, and that seems to work. So, for now I have a workaround, however, I am still looking to get an proper solution to access the server through the normal local IP address.
I have added a diagnostics file in the attachments.
sapanca-diagnostics-20240329-2121.zip