Error installing VQMOD

Hi all
i need to install vqmod because a developer i use has done some work i need on a previous site using vqmod.
i have used the instructions from here https://github.com/vqmod/vqmod/wiki/Ins ... n-OpenCart to install vqmod for oc2x
and loading the home page i got this
Fatal error: Uncaught Error: Class 'Controllercommon' not found in /var/sites/t/themeatingjoint.shop/public_html/tmjd/vqmod/vqcache/vq2-system_storage_modification_system_engine_loader.php:28 Stack trace: #0 /var/sites/t/themeatingjoint.shop/public_html/tmjd/vqmod/vqcache/vq2-catalog_controller_common_home.php(16): Loader->controller('common/content_...') #1 /var/sites/t/themeatingjoint.shop/public_html/tmjd/vqmod/vqcache/vq2-system_storage_modification_system_engine_action.php(46): ControllerCommonHome->index(Array) #2 /var/sites/t/themeatingjoint.shop/public_html/tmjd/system/engine/front.php(34): Action->execute(Object(Registry)) #3 /var/sites/t/themeatingjoint.shop/public_html/tmjd/system/engine/front.php(29): Front->execute(Object(Action)) #4 /var/sites/t/themeatingjoint.shop/public_html/tmjd/index.php(288): Front->dispatch(Object(Action), Object(Action)) #5 {main} thrown in /var/sites/t/themeatingjoint.shop/public_html/tmjd/vqmod/vqcache/vq2-system_storage_modification_system_engine_loader.php on line 28

anyone advise what the problem is and what i need?
thanks

george

Caused by an installed extension where an invalid class name has been defined. Contact the extension developer to resolved this issue.

Possibly but since this install is BEFORE I installed his mods unlikely... Also looking at the backend as admin even though the install displayed Vwmid had installed there is no sign of it in the installed mids