After upgrading to R8 the "Symantec Backup Exec Plugin" does not work.
This may include seeing "Runtime" errors and other unexpected results on the plug-in pages
This plugin module is provided by Symantec and as such Kaseya is not able to update this module.
The current Symantec plugin for Backup Exec is not compatible with Kaseya R8.
WORKAROUND / RESOLUTION
Please contact Symantec for an updated version of this plugin.
For a list of known plugins and their current R8 compatibility, please see this KB article