Fatal error: Uncaught Error: Call to undefined method comments::callIfExists() in /var/www/proprofi.online/data/www/proprofi.online/system/controllers/comments/frontend.php:85 Stack trace: #0 /var/www/proprofi.online/data/www/proprofi.online/system/controllers/comments/frontend.php(151): comments->getNativeComments() #1 /var/www/proprofi.online/data/www/proprofi.online/system/core/action.php(74): comments->getWidget() #2 /var/www/proprofi.online/data/www/proprofi.online/system/controllers/comments/hooks/content_before_item.php(29): cmsAction->__call('getWidget', Array) #3 /var/www/proprofi.online/data/www/proprofi.online/system/core/controller.php(780): onCommentsContentBeforeItem->run(Array) #4 /var/www/proprofi.online/data/www/proprofi.online/system/core/controller.php(739): cmsController->runExternalHook('content_before_...', Array) #5 /var/www/proprofi.online/data/www/proprofi.online/system/core/eventsmanager.php(142): cmsController->runHook('content_before_...', Array) #6 /var/www/proprofi.online/data/www/proprofi.on in /var/www/proprofi.online/data/www/proprofi.online/system/controllers/comments/frontend.php on line 85