If you get below errors then simply try to reinstall the RVSitebuilder with respect to resolve the issue:
NO DATA there was a problem initialising perms
Fatal error: The encoded file /var/cpanel/rvglobalsoft/rvsitebuilder/www/ionctestlicense.php requires a license file.The license file /var/cpanel/rvglobalsoft/rvsitebuilder/rvsitebuilder.lic has expired. in Unknown on line 0
You just need to fire following commands to resolve this issue.
rm -f /var/cpanel/rvglobalsoft/rvsitebuilder/var/INSTALL_COMPLETE.php
rm -f /var/cpanel/rvglobalsoft/rvsitebuilder/rvsitebuilderversion.txt
Once process complete everything will work normally.