If your Web Applications are not showing in cPanel or you experience any other issue with Installatron, the first step when troubleshooting would be to try their repair script. All you will need to do is run these commands as root:
rm -fr /usr/local/installatron/lib /usr/local/installatron/etc/php.ini
curl -O https://data.installatron.com/installatron-plugin.sh
chmod +x installatron-plugin.sh
./installatron-plugin.sh -f –quick
Tip: To run repair in interactive mode, remove -f from the last command.
That should do it.