500s after an update and migration

Hi, I am seeing this error after an update:
```
Stack trace:
#0 /var/www/wallabag/vendor/craue/config-bundle/Util/Config.php(77): Craue\ConfigBundle\Util\Config->createNotFoundException('piwik_enabled')
#1 /var/www/wallabag/vendor/craue/config-bundle/Twig/Extension/ConfigTemplateExtension.php(96): Craue\ConfigBundle\Util\Config->get('piwik_enabled')
#2 /var/www/wallabag/var/cache/prod/twig/e5/e59b3c6ba046bc5541ec427c6fe013ac603e567122ed934d6dc17178083d1b89.php(96): Craue\ConfigBundle\Twig\Extension\ConfigTemplateExtension->getSetting('piwik_enabled')
#3 /var/www/wallabag/vendor/twig/twig/src/Template.php(443): __TwigTemplate_248ffdebaf41f0c401270de5135adaa2a06bcf1a73c1cf5c0f36284706bf3bb5->doDisplay(Array, Array)
#4 /var/www/wallabag/vendor/twig/twig/src/Template.php(414): Twig\Template->displayWithErrorHandling(Array, Array)
#5 /var/www/wallabag/var/cache/prod/twig/d9/d956e063b" while reading response header from upstream, client: 172.19.0.1, server: _, request: "GET /login HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "wallabag.home.ramirodelcorro.com"
```
I also followed the docs and migrated the database:

```
/ # /var/www/wallabag/bin/console doctrine:migrations:migrate --env=prod --no-interaction
PHP Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /var/www/wallabag/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php on line 2636
PHP Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /var/www/wallabag/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php on line 2665

Application Migrations

No migrations to execute.
```