InvalidArgumentException: Plugin class Amasty\PageSpeedOptimizer\Plugin\Framework\App\Http\Context doesn't exist in /cache/vendor/magento/framework/Interception/PluginList/PluginList.php:182 Stack trace: #0 /cache/vendor/magento/framework/Interception/PluginList/PluginList.php(268): Magento\Framework\Interception\PluginList\PluginList->_inheritPlugins('Magento\\Framewo...') #1 /cache/generated/code/Magento/Framework/App/Http/Context/Interceptor.php(22): Magento\Framework\Interception\PluginList\PluginList->getNext('Magento\\Framewo...', 'getVaryString') #2 /cache/vendor/magento/framework/App/Response/Http.php(108): Magento\Framework\App\Http\Context\Interceptor->getVaryString() #3 /cache/vendor/magento/module-page-cache/Model/App/Response/HttpPlugin.php(25): Magento\Framework\App\Response\Http->sendVary() #4 /cache/vendor/magento/framework/Interception/Interceptor.php(121): Magento\PageCache\Model\App\Response\HttpPlugin->beforeSendResponse(Object(Magento\Framework\App\Response\Http\Interceptor)) #5 /cache/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Response\Http\Interceptor->Magento\Framework\Interception\{closure}() #6 /cache/generated/code/Magento/Framework/App/Response/Http/Interceptor.php(26): Magento\Framework\App\Response\Http\Interceptor->___callPlugins('sendResponse', Array, Array) #7 /cache/vendor/magento/framework/App/ExceptionHandler.php(103): Magento\Framework\App\Response\Http\Interceptor->sendResponse() #8 /cache/vendor/magento/framework/App/ExceptionHandler.php(70): Magento\Framework\App\ExceptionHandler->handleDeveloperMode(Object(Magento\Framework\App\Bootstrap), Object(InvalidArgumentException), Object(Magento\Framework\App\Response\Http\Interceptor)) #9 /cache/vendor/magento/framework/App/Http.php(156): Magento\Framework\App\ExceptionHandler->handle(Object(Magento\Framework\App\Bootstrap), Object(InvalidArgumentException), Object(Magento\Framework\App\Response\Http\Interceptor), Object(Magento\Framework\App\Request\Http)) #10 /cache/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\Http->catchException(Object(Magento\Framework\App\Bootstrap), Object(InvalidArgumentException)) #11 /cache/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\App\Http\Interceptor->___callParent('catchException', Array) #12 /cache/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Bootstrap), Object(InvalidArgumentException)) #13 /cache/generated/code/Magento/Framework/App/Http/Interceptor.php(26): Magento\Framework\App\Http\Interceptor->___callPlugins('catchException', Array, Array) #14 /cache/vendor/magento/framework/App/Bootstrap.php(267): Magento\Framework\App\Http\Interceptor->catchException(Object(Magento\Framework\App\Bootstrap), Object(InvalidArgumentException)) #15 /cache/pub/index.php(41): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http\Interceptor)) #16 {main}