Unable to find the controller for path "/login_check"

Reproducible by navigating directly to /login_check

```
Unable to look for the controller as the "_controller" parameter is missing.
```

```
Uncaught PHP Exception Symfony\Component\HttpKernel\Exception\NotFoundHttpException: "Unable to find the controller for path "/login_check". The route is wrongly configured." at HttpKernel.php line 167
```