I had installed XAMPP 7.4.11.0 on Ubuntu server 20.04.1 LTS and it was working great. The localhost was working on Apache, Moodle was working, Wordpress was working. I shut the server down and brought it back up two days later. Now localhost does not work. I checked and ports 80 and 443 were not accepting requests, ufw down. When I attempt to launch the XAMPP Control Panel I get:
"Unknown error in application." I then uninstalled XAMPP 7.4.11.0 and installed XAMPP 8.0.0.0. Now I get the same error. Rebooting doesn't help.