Warning: is_readable() [function.is-readable]: open_basedir restriction in effect. File(/var/cpanel/rvglobalsoft/rvsitebuilder) is not within the allowed path(s): (/home/webstore:/usr/lib/php:/usr/local/lib/php:/tmp) in /home/webstore/public_html/sitebuilder/tryoutlogin/www/rvsValidateConfigFile.php on line 29
/home/webstore/public_html/sitebuilder/tryoutlogin/www/rvsValidateConfigFile.php

Contact your hosting provider, to manually update your custom_vhost_template_ap1 and custom_vhost_template_ap2 values.
Your provider can update your custom_vhost_template_ap1 and custom_vhost_template_ap2 values by follow instruction here.

1. SSH to the server as root and add custom_vhost_template_ap1 and custom_vhost_template_ap2 values on the end of file
/var/cpanel/userdata/USER_NAME/TRYOUT_WEBSITE_DOMAIN. Replace USER_NAME and TRYOUT_WEBSITE_DOMAIN with your own values.

custom_vhost_template_ap1:/var/cpanel/rvglobalsoft/rvsitebuilder/panelmenus/cpanel/apachetemplate/tryout.rvsitebuilder.apache1
custom_vhost_template_ap2:/var/cpanel/rvglobalsoft/rvsitebuilder/panelmenus/cpanel/apachetemplate/tryout.rvsitebuilder.apache2

2. Then run /scripts/rebuildhttpdconf
3. If all ok, run /scripts/restartsrv httpd

After fix the issue, click here to go to your tryout website.