actually, for reasons i do not understand the config.php still contained the line
$config['enableListeners'] = false;
                                                     
I then deleted it and made sure the config file was in its original form BUT that lead to this error on my forum (again making it inaccessible!!!)
                                                                                                           
Oops! We ran into some problems.
           An error occurred while the page was being generated. Please try again later.    
                                   
the server error is this:
Exception: Could not find class Hampel\KnownBots\XF\Repository\SessionActivity when attempting to extend XF\Repository\SessionActivityRepository in src/XF/Extension.php at line 217
    XF\Extension->extendClass() in src/XF/Mvc/Entity/Manager.php at line 295
    XF\Mvc\Entity\Manager->getRepository() in src/XF/Mvc/Controller.php at line 1051
    XF\Mvc\Controller->repository() in src/XF/Admin/Controller/IndexController.php at line 43
    XF\Admin\Controller\IndexController->actionIndex() in src/XF/Mvc/Dispatcher.php at line 362
    XF\Mvc\Dispatcher->dispatchClass() in src/XF/Mvc/Dispatcher.php at line 264
    XF\Mvc\Dispatcher->dispatchFromMatch() in src/XF/Mvc/Dispatcher.php at line 121
    XF\Mvc\Dispatcher->dispatchLoop() in src/XF/Mvc/Dispatcher.php at line 63
    XF\Mvc\Dispatcher->run() in src/XF/App.php at line 2777
    XF\App->run() in src/XF.php at line 798
    XF::runApp() in admin.php at line 15