Fatal error: Uncaught InvalidArgumentException: SilverStripe\ErrorPage\ErrorPage references nonexistent in 'extensions' in /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Middleware/ExtensionMiddleware.php:70
Stack trace:
#0 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Middleware/ExtensionMiddleware.php(41): SilverStripe\Core\Config\Middleware\ExtensionMiddleware->getExtraConfig('SilverStripe\\Er...', Array, 0)
#1 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/MiddlewareAware.php(56): SilverStripe\Core\Config\Middleware\ExtensionMiddleware->getClassConfig('SilverStripe\\Er...', 0, Object(Closure))
#2 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Middleware/InheritanceMiddleware.php(30): SilverStripe\Config\Collections\MemoryConfigCollection->SilverStripe\Config\Middleware\{closure}('SilverStripe\\Er...', 0)
#3 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/MiddlewareAware.php(56): SilverStripe\Core\Config\Middleware\InheritanceMiddleware->getClassConfig('SilverStripe\\Er...', 0, Object(Closure))
#4 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/DeltaMiddleware.php(73): SilverStripe\Config\Collections\MemoryConfigCollection->SilverStripe\Config\Middleware\{closure}('SilverStripe\\Er...', 0)
#5 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/MiddlewareAware.php(56): SilverStripe\Config\Middleware\DeltaMiddleware->getClassConfig('SilverStripe\\Er...', 0, Object(Closure))
#6 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/MiddlewareAware.php(59): SilverStripe\Config\Collections\MemoryConfigCollection->SilverStripe\Config\Middleware\{closure}('SilverStripe\\Er...', 0)
#7 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Collections/MemoryConfigCollection.php(141): SilverStripe\Config\Collections\MemoryConfigCollection->callMiddleware('SilverStripe\\Er...', 0, Object(Closure))
#8 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Collections/MemoryConfigCollection.php(104): SilverStripe\Config\Collections\MemoryConfigCollection->getClassConfig('SilverStripe\\Er...', 0)
#9 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Config_ForClass.php(96): SilverStripe\Config\Collections\MemoryConfigCollection->get('SilverStripe\\Er...', 'enable_static_f...', 0)
#10 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/errorpage/src/ErrorPage.php(372): SilverStripe\Core\Config\Config_ForClass->get('enable_static_f...')
#11 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/errorpage/src/ErrorPageErrorFormatter.php(23): SilverStripe\ErrorPage\ErrorPage::get_content_for_errorcode(500)
#12 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Logging/DebugViewFriendlyErrorFormatter.php(108): SilverStripe\ErrorPage\ErrorPageErrorFormatter->output(500)
#13 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/monolog/monolog/src/Monolog/Handler/AbstractProcessingHandler.php(37): SilverStripe\Logging\DebugViewFriendlyErrorFormatter->format(Array)
#14 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/monolog/monolog/src/Monolog/Logger.php(344): Monolog\Handler\AbstractProcessingHandler->handle(Array)
#15 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/monolog/monolog/src/Monolog/Logger.php(614): Monolog\Logger->addRecord(400, 'Uncaught Except...', Array)
#16 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/monolog/monolog/src/Monolog/ErrorHandler.php(137): Monolog\Logger->log(400, 'Uncaught Except...', Array)
#17 [internal function]: Monolog\ErrorHandler->handleException(Object(InvalidArgumentException))
#18 {main}
thrown in /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Middleware/ExtensionMiddleware.php on line 70
Fatal error: Uncaught InvalidArgumentException: SilverStripe\ErrorPage\ErrorPage references nonexistent in 'extensions' in /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Middleware/ExtensionMiddleware.php:70
Stack trace:
#0 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Middleware/ExtensionMiddleware.php(41): SilverStripe\Core\Config\Middleware\ExtensionMiddleware->getExtraConfig('SilverStripe\\Er...', Array, 0)
#1 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/MiddlewareAware.php(56): SilverStripe\Core\Config\Middleware\ExtensionMiddleware->getClassConfig('SilverStripe\\Er...', 0, Object(Closure))
#2 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Middleware/InheritanceMiddleware.php(30): SilverStripe\Config\Collections\MemoryConfigCollection->SilverStripe\Config\Middleware\{closure}('SilverStripe\\Er...', 0)
#3 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/MiddlewareAware.php(56): SilverStripe\Core\Config\Middleware\InheritanceMiddleware->getClassConfig('SilverStripe\\Er...', 0, Object(Closure))
#4 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/DeltaMiddleware.php(73): SilverStripe\Config\Collections\MemoryConfigCollection->SilverStripe\Config\Middleware\{closure}('SilverStripe\\Er...', 0)
#5 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/MiddlewareAware.php(56): SilverStripe\Config\Middleware\DeltaMiddleware->getClassConfig('SilverStripe\\Er...', 0, Object(Closure))
#6 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Middleware/MiddlewareAware.php(59): SilverStripe\Config\Collections\MemoryConfigCollection->SilverStripe\Config\Middleware\{closure}('SilverStripe\\Er...', 0)
#7 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Collections/MemoryConfigCollection.php(141): SilverStripe\Config\Collections\MemoryConfigCollection->callMiddleware('SilverStripe\\Er...', 0, Object(Closure))
#8 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/config/src/Collections/MemoryConfigCollection.php(104): SilverStripe\Config\Collections\MemoryConfigCollection->getClassConfig('SilverStripe\\Er...', 0)
#9 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Config_ForClass.php(96): SilverStripe\Config\Collections\MemoryConfigCollection->get('SilverStripe\\Er...', 'enable_static_f...', 0)
#10 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/errorpage/src/ErrorPage.php(372): SilverStripe\Core\Config\Config_ForClass->get('enable_static_f...')
#11 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/errorpage/src/ErrorPageErrorFormatter.php(23): SilverStripe\ErrorPage\ErrorPage::get_content_for_errorcode(500)
#12 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Logging/DebugViewFriendlyErrorFormatter.php(108): SilverStripe\ErrorPage\ErrorPageErrorFormatter->output(500)
#13 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/monolog/monolog/src/Monolog/Handler/AbstractProcessingHandler.php(37): SilverStripe\Logging\DebugViewFriendlyErrorFormatter->format(Array)
#14 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/monolog/monolog/src/Monolog/Logger.php(344): Monolog\Handler\AbstractProcessingHandler->handle(Array)
#15 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/monolog/monolog/src/Monolog/Logger.php(614): Monolog\Logger->addRecord(550, 'Fatal Error (E_...', Array)
#16 /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/monolog/monolog/src/Monolog/ErrorHandler.php(188): Monolog\Logger->log(550, 'Fatal Error (E_...', Array)
#17 [internal function]: Monolog\ErrorHandler->handleFatalError()
#18 {main}
thrown in /var/www/BITWINGS/htdocs/musterwebsites/musterwebsite-big/vendor/silverstripe/framework/src/Core/Config/Middleware/ExtensionMiddleware.php on line 70