Nice …
Maybe again a problem with the cert/bundle-file … this time check if the service is running correctly:
service linuxmuster-webui status
or
service linuxmuster-webui restart
Check if you can connect:
openssl s_client -connect yourservername.fqdn.hu:443
Normally there’s no need to do this manually. I use Let’s Encrypt (ACME) directly on the OPNSense. So the OPNSense does the job and all I have to do is to copy the certs to the server. Works like a charm…