Encryption module not working

Hello,

i tried to activate the Encryption module, itś working with the shell command, but the Nextcloud the Nextcloud Log is spamming me with following:

internet_connection_check OC\Encryption\Exceptions\ModuleDoesNotExistsException: Default encryption module not loaded

/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Encryption/Manager.php - line 201: OC\Encryption\Manager->getDefaultEncryptionModule()
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Files/Storage/Wrapper/Encryption.php - line 1017: OC\Encryption\Manager->getEncryptionModule()
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Files/Storage/Wrapper/Encryption.php - line 447: OC\Files\Storage\Wrapper\Encryption->shouldEncrypt('files_external/...')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Files/Storage/LocalTempFileTrait.php - line 66: OC\Files\Storage\Wrapper\Encryption->fopen('files_external/...', 'r')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Files/Storage/LocalTempFileTrait.php - line 49: OC\Files\Storage\Wrapper\Encryption->toTmpFile('files_external/...')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Files/Storage/Wrapper/Encryption.php - line 778: OC\Files\Storage\Wrapper\Encryption->getCachedFile('files_external/...')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php - line 360: OC\Files\Storage\Wrapper\Encryption->getLocalFile('files_external/...')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php - line 360: OC\Files\Storage\Wrapper\Wrapper->getLocalFile('files_external/...')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php - line 360: OC\Files\Storage\Wrapper\Wrapper->getLocalFile('files_external/...')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Files/View.php - line 242: OC\Files\Storage\Wrapper\Wrapper->getLocalFile('files_external/...')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Security/CertificateManager.php - line 227: OC\Files\View->getLocalFile('/files_external...')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Http/Client/Client.php - line 74: OC\Security\CertificateManager->getAbsoluteBundlePath(NULL)
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Http/Client/Client.php - line 137: OC\Http\Client\Client->setDefaultOptions()
/var/www/vhosts/larsmueller.net/nextcloud/settings/Controller/CheckSetupController.php - line 125: OC\Http\Client\Client->get('http //www.gith...')
/var/www/vhosts/larsmueller.net/nextcloud/settings/Controller/CheckSetupController.php - line 108: OC\Settings\Controller\CheckSetupController->isSiteReachable('www.github.com')
/var/www/vhosts/larsmueller.net/nextcloud/settings/Controller/CheckSetupController.php - line 414: OC\Settings\Controller\CheckSetupController->isInternetConnectionWorking()
[internal function] OC\Settings\Controller\CheckSetupController->check()
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 160: call_user_func_array(Array, Array)
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 90: OC\AppFramework\Http\Dispatcher->executeController(Object(OC\Settings\Controller\CheckSetupController), 'check')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/AppFramework/App.php - line 114: OC\AppFramework\Http\Dispatcher->dispatch(Object(OC\Settings\Controller\CheckSetupController), 'check')
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/AppFramework/Routing/RouteActionHandler.php - line 47: OC\AppFramework\App main('OC\\Settings\\Con...', 'check', Object(OC\AppFramework\DependencyInjection\DIContainer), Array)
[internal function] OC\AppFramework\Routing\RouteActionHandler->__invoke(Array)
/var/www/vhosts/larsmueller.net/nextcloud/lib/private/Route/Router.php - line 299: call_user_func(Object(OC\AppFramework\Routing\RouteActionHandler), Array)
/var/www/vhosts/larsmueller.net/nextcloud/lib/base.php - line 1000: OC\Route\Router->match('/settings/ajax/...')
/var/www/vhosts/larsmueller.net/nextcloud/index.php - line 40: OC handleRequest()
{main}

At the same time nextcloud tells me i have no Internet connecction. But the Cloud is on an Dedicated Server and has always internet.
Maybe the App is broken for me, i cant set an Recovery Key in the Admin Settings and also at the Userbackend not option.

Can anyone help me?