Hi Abkrim. Apologies on my really slow response.

I've had my head down trying to push the new v15.0 release out the door. Having said that, I have posted on the forums since your post, but must have just missed it. Sorry about that.

What exactly are you trying to do?

If you are trying to create a "proper" (i.e. not self signed) SSL certificate for your server then the way to do that is via our CLI tool, Confconsole. It has support for creating free "Let's Encrypt" certificates. Please note though that the version included in v14.2 has a bug. The workaround for the bug is noted in a comment.

That will generate a Let's Encrypt SSL cert which all https interfaces should use from here on in.

Unfortunately though, it's likely that the steps you have taken have broken the default Webmin config. So you'll need to fix that. I forget exactly the steps, but you'll need to edit the Webmin server config file and disable SSL (Webmin is served behind Stunnel - which provides SSL for both Web Shell and Webmin). I'm pretty sure, just setting ssl= in that file should do the trick. You'll also need to restart Webmin. So this should do the trick (from the commandline):

sed -i "s|^ssl=.*|ssl=|" /etc/webmin/miniserv.conf
service webmin restart

If that still doesn't work, please post your full /etc/webmin/miniserv.conf file (ideally please copy/paste the text) and I'll try to help out. You can get the current config like this:

cat /etc/webmin/miniserv.conf