While that issue gave me some ideas where to look for the source of the error I can't find it.
Clearing all the caches and resetting the System Settings does not help. Any ideas what might have happened?
Psr\Log\InvalidArgumentException:
Level "info" is not defined, use one of: 100, 200, 250, 300, 400, 500, 550, 600
at vendor/monolog/monolog/src/Monolog/Logger.php:516
at Monolog\Logger::getLevelName('info')
(vendor/monolog/monolog/src/Monolog/Logger.php:298)
at Monolog\Logger->addRecord('info', 'User Deprecated: The Symfony\\Bundle\\FrameworkBundle\\Templating\\Helper\\ActionsHelper class is deprecated since version 4.3 and will be removed in 5.0; use Twig instead.', array('exception' => object(ErrorException)))
(vendor/monolog/monolog/src/Monolog/Logger.php:609)
at Monolog\Logger->log('info', 'User Deprecated: The Symfony\\Bundle\\FrameworkBundle\\Templating\\Helper\\ActionsHelper class is deprecated since version 4.3 and will be removed in 5.0; use Twig instead.', array('exception' => object(ErrorException)))
(vendor/symfony/symfony/src/Symfony/Component/Debug/ErrorHandler.php:503)
at Symfony\Component\Debug\ErrorHandler->handleError(16384, 'The Symfony\\Bundle\\FrameworkBundle\\Templating\\Helper\\ActionsHelper class is deprecated since version 4.3 and will be removed in 5.0; use Twig instead.', '/var/www/pimcore/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/ActionsHelper.php', 14, array('class' => 'Symfony\\Bundle\\FrameworkBundle\\Templating\\Helper\\ActionsHelper', 'e' => 22519, 'file' => '/var/www/pimcore/vendor/composer/../symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/ActionsHelper.php'))
at trigger_error('The Symfony\\Bundle\\FrameworkBundle\\Templating\\Helper\\ActionsHelper class is deprecated since version 4.3 and will be removed in 5.0; use Twig instead.', 16384)
(vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/ActionsHelper.php:14)
at require('/var/www/pimcore/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/ActionsHelper.php')
(vendor/symfony/symfony/src/Symfony/Component/Debug/DebugClassLoader.php:156)
at Symfony\Component\Debug\DebugClassLoader->loadClass('Symfony\\Bundle\\FrameworkBundle\\Templating\\Helper\\ActionsHelper')
at spl_autoload_call('Symfony\\Bundle\\FrameworkBundle\\Templating\\Helper\\ActionsHelper')
(var/cache/dev/ContainerWeY7xTr/appAppKernelDevDebugContainer.php:3197)
at ContainerWeY7xTr\appAppKernelDevDebugContainer->getTemplating_Helper_ActionsService()
(var/cache/dev/ContainerWeY7xTr/appAppKernelDevDebugContainer.php:1565)
at ContainerWeY7xTr\appAppKernelDevDebugContainer->getPimcore_Templating_ActionRendererService()
(var/cache/dev/ContainerWeY7xTr/getDocumentRendererService.php:9)
at require('/var/www/pimcore/var/cache/dev/ContainerWeY7xTr/getDocumentRendererService.php')
(var/cache/dev/ContainerWeY7xTr/appAppKernelDevDebugContainer.php:408)
at ContainerWeY7xTr\appAppKernelDevDebugContainer->load('getDocumentRendererService.php')
(var/cache/dev/ContainerWeY7xTr/getResponseExceptionListenerService.php:9)
at require('/var/www/pimcore/var/cache/dev/ContainerWeY7xTr/getResponseExceptionListenerService.php')
(var/cache/dev/ContainerWeY7xTr/appAppKernelDevDebugContainer.php:408)
at ContainerWeY7xTr\appAppKernelDevDebugContainer->load('getResponseExceptionListenerService.php')
(var/cache/dev/ContainerWeY7xTr/appAppKernelDevDebugContainer.php:1098)
at ContainerWeY7xTr\appAppKernelDevDebugContainer->ContainerWeY7xTr\{closure}()
(vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/EventDispatcher.php:275)
at Symfony\Component\EventDispatcher\EventDispatcher->sortListeners('kernel.exception')
(vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/EventDispatcher.php:92)
at Symfony\Component\EventDispatcher\EventDispatcher->getListeners('kernel.exception')
(vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php:334)
at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->preProcess('kernel.exception')
(vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php:162)
at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch(object(ExceptionEvent), 'kernel.exception')
(vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php:222)
at Symfony\Component\HttpKernel\HttpKernel->handleException(object(InvalidArgumentException), object(Request), 1)
(vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php:79)
at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
(vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php:198)
at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
(web/app.php:36)