Fatal error: Uncaught AmpProject\AmpWP\Exception\FailedToMakeInstance: Could not reflect on the interface or class "AmpProject\AmpWP\Instrumentation\StopWatch", probably not a valid FQCN. in /htdocs/wp-content/plugins/amp/src/Exception/FailedToMakeInstance.php:93 Stack trace: #0 /htdocs/wp-content/plugins/amp/src/Infrastructure/Injector/SimpleInjector.php(459): AmpProject\AmpWP\Exception\FailedToMakeInstance::for_unreflectable_class('AmpProject\\AmpW...') #1 /htdocs/wp-content/plugins/amp/src/Infrastructure/Injector/SimpleInjector.php(197): AmpProject\AmpWP\Infrastructure\Injector\SimpleInjector->get_class_reflection('AmpProject\\AmpW...') #2 /htdocs/wp-content/plugins/amp/src/Infrastructure/Injector/SimpleInjector.php(340): AmpProject\AmpWP\Infrastructure\Injector\SimpleInjector->make_dependency(Object(AmpProject\AmpWP\Infrastructure\Injector\InjectionChain), 'AmpProject\\AmpW...') #3 /htdocs/wp-content/plugins/amp/src/Infrastructure/Injector/SimpleInjector.php(273): AmpProject\AmpWP\Infrastructure\Injector\SimpleInjector->resolve_argument(Object(AmpProject\AmpWP\Infrastructure\Injector\InjectionChain), 'AmpProject\\AmpW...', Object(ReflectionParameter), Array) #4 [internal function]: AmpProject\AmpWP\Infrastructure\Injector\SimpleInjector->AmpProject\AmpWP\Infrastructure\Injector\{closure}(Object(ReflectionParameter)) #5 /htdocs/wp-content/plugins/amp/src/Infrastructure/Injector/SimpleInjector.php(271): array_map(Object(Closure), Array) #6 /htdocs/wp-content/plugins/amp/src/Infrastructure/Injector/SimpleInjector.php(89): AmpProject\AmpWP\Infrastructure\Injector\SimpleInjector->get_dependencies_for(Object(AmpProject\AmpWP\Infrastructure\Injector\InjectionChain), Object(ReflectionClass), Array) #7 /htdocs/wp-content/plugins/amp/src/Infrastructure/ServiceBasedPlugin.php(476): AmpProject\AmpWP\Infrastructure\Injector\SimpleInjector->make('AmpProject\\AmpW...') #8 /htdocs/wp-content/plugins/amp/src/Infrastructure/ServiceBasedPlugin.php(417): AmpProject\AmpWP\Infrastructure\ServiceBasedPlugin->instantiate_service('AmpProject\\AmpW...') #9 /htdocs/wp-content/plugins/amp/src/Infrastructure/ServiceBasedPlugin.php(390): AmpProject\AmpWP\Infrastructure\ServiceBasedPlugin->maybe_register_service('server_timing', 'AmpProject\\AmpW...') #10 /htdocs/wp-includes/class-wp-hook.php(324): AmpProject\AmpWP\Infrastructure\ServiceBasedPlugin->AmpProject\AmpWP\Infrastructure\{closure}('') #11 /htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #12 /htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #13 /htdocs/wp-settings.php(727): do_action('init') #14 /htdocs/wp-config.php(82): require_once('/htdocs/wp-sett...') #15 /htdocs/wp-load.php(50): require_once('/htdocs/wp-conf...') #16 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...') #17 /htdocs/index.php(17): require('/htdocs/wp-blog...') #18 {main} thrown in /htdocs/wp-content/plugins/amp/src/Exception/FailedToMakeInstance.php on line 93