[ampersand83]

Hey,

just open the plugin declaration in your vBulletin installation and insert

PHP Code:

require_once(DIR . '/includes/class_block.php'); 


above

PHP Code:

$blockmanager = vB_BlockManager::create($vbulletin); 


. This loads the missing class and everything works fine again.
I don't know what caused the error but somehow this class must have been loaded at someplace else in a former VB version.

Cheers,

Stefan