Once you finished running RVsitebuilder installation in SSH, and access to WHM -> RVglobalsoft Manager -> RVsitebuilder to Setup, but you got the following error.

Your problem may have the problem on pear package, on the disable_functions

So, please try the following solution.

1. Edit dit file /usr/local/lib/php.ini by removing PHP function popen, ini_set

Then the server will be able to be installed pear package and setup successful.

2. Setup pear again

3. Restart apache

4. Install RVSB again.https://www.rvsitebuilder.com/installation