If you got the Template Loading stuck from RVSitebuilder Step Home.
Please contact your host provider to run force update RVSitebuilder to fix the problem.
Below are the steps your host needs to do,
perl /usr/local/cpanel/whostmgr/docroot/cgi/rvsitebuilderinstaller/autoinstaller.cgi –force
And remove the following files:
rm -f /var/cpanel/rvglobalsoft/rvsitebuilder/www/userdata/securervsite/templateinfo.ini
/home/{user}/.rvsitebuilder/cach
/home/{user}/.rvsitebuilder/tmp