Cant’t help but chek if ssh or webmin is running for example
so check on command line what yes or no is running
- Connect to your VPS service via SSH. You will need to log in as the root user in order to run the restart command.
- On the command line, type the command
/etc/init.d/webmin stopand press Enter. Note that you may get an error message that says the Webmin service is already stopped. This is okay.- On the command line, type the command
/etc/init.d/webmin startand press Enter.
Then you can try other browsers and howto workarround in brwoser or set things that cypher if without error running services on server.
I have see this once myself longer time ago, can’t remember but then you can most of the times when services are running wel but not the ssl do some at command line with the letsencrypt / certbot search the web
Dont know which versions yes no support from OS you use,
MOST IMPORTANT have you backups of data and databases? no then try to get as much as possible backups from data and databases before doing …
Not sure if you are using letsencrypt and this can help you while also other versions and OS but who knows:
Letsencrypt fails for some sites on same server - Help! (Home for newbies) - Virtualmin Community