Reproducible scenario:
- Sign in as admin in the default language (English)
- Create a form with the form builder
- Change the language into a non-default one (e.g. Dutch)
- Edit the form you just created.
Expected: you can edit the form you just created.
Actual: the page keeps on loading (showing a loading indicator, see screenshot) and this never ends. There are no errors in the server logs nor in the browser console.