Background image: Allow user to select a Image Style

This need to be passing the interface FileUrlGeneratorInterface otherwise you'll have issues with other file generators.

@b_sharpe is right indeed. Such an error can be reproduced should you enable CDN module → .

Attached is an updated patch that uses FileUrlGeneratorInterface instead of FileUrlGenerator.

Thanks, for reporting and patching!

While you are making the above changes, we recommend that you convert this patch to a merge request. Merge requests → are preferred over patches. Be sure to hide the old patch files as well.

Nice idea and fix
Planed for 🐛 Fix Layout Builder section rendering original Background Image when no background options, no image styles, or lazy loading are applied Active
But seems that this is a good way to fix the issue.