Sometimes we are facing license related issues even after updating license for rvsite in the server,
To test the license run:
/var/cpanel/rvglobalsoft/rvsitebuilder/www/ionctestlicense.php
To update license run the following:
/var/cpanel/rvglobalsoft/rvsitebuilder/updatelicense.php
This will help to resolve the error no need to reinstall rvsitebuilder.