how to resolve the below error

Uncaught Error: Class 'Controllerextensionextensionmodule' not found in /home/perfectbody1234/public_html/perfectbody.in/new/system/engine/action.php:43 Stack trace: #0 /home/perfectbody1234/public_html/perfectbody.in/new/admin/controller/startup/router.php(26): Action->execute(Object(Registry), Array) #1 /home/perfectbody1234/public_html/perfectbody.in/new/system/engine/action.php(51): ControllerStartupRouter->index() #2 /home/perfectbody1234/public_html/perfectbody.in/new/system/engine/front.php(34): Action->execute(Object(Registry)) #3 /home/perfectbody1234/public_html/perfectbody.in/new/system/engine/front.php(29): Front->execute(Object(Action)) #4 /home/perfectbody1234/public_html/perfectbody.in/new/system/framework.php(103): Front->dispatch(Object(Action), Object(Action)) #5 /home/perfectbody1234/public_html/perfectbody.in/new/system/startup.php(124): require_once('/home/perfectbo...') #6 /home/perfectbody1234/public_html/perfectbody.in/new/admin/index.php(22): start('admin') #7 {main} thrown in /home/perfectbody1234/public_html/perfectbody.in/new/system/engine/action.php on line 43

Probably one of the extensions is causing it. Find the extension and contact its developer on the matter.