My domain is: qpsy.de
The operating system my web server runs on is (include version): Ubuntu 18-04
I can login to a root shell on my machine (yes or no, or I don’t know): yes
I installed certbot yesterday and everything worked fine at first. A few hours later when I checked I noticed I couldn’t reach my site anymore. I logged onto the server and restarted apache - everything seemed to work again but again, after some time, the site can’t be reached.
What could be the problem?