After you changed your server the server type between suphp and DSO, you need to do the following solution for RVsitebuilder.

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For server administrator

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SSH to the server as root and run this command.

rm -rf /home/*/.rvsitebuilder/websitepublish/*/var/cache/tmpl

rm -rf /home/*/.rvsitebuilder/websitepublish/*/var/config

rm -rf /home/*/.rvsitebuilder/websitepublish/*/var/tmp

chmod 777 -R /home/*/.rvsitebuilder/websitepublish/*/var/cache

This will resolve the problem for all users.

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For End-users

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1. Access to your file system using FTP or File Manager.
2. Rename /.rvsitebuilder/websitepublish/{project_id}/var to /.rvsitebuilder/websitepublish/{project_id}/var.bak .
3. Create new var folder.
4. Change permission for var to 777.
5. Move the following folders in var.bak to the new var.

INSTALL_COMPLETE.php

{project_id}.conf.php

rvsautosetup.ini.php

rvstemplateconf.ini.php

subscribeMailList.txt

uploads

6. Change permission of moved files and folders on step5 and 6 to 777.
7. Republish the web site to restore entities and config folders on the new var. Make sure you check the checkbox for 'force update' in order to restore entities folder.