Just Media file instead of light box

Hi @tippl,

Please provide a Link where the issue happens.

https://test.lechatinformatique.de

Do you use the Gallery in a Post or Page? If its inside a Widget or Template, you have to load the script and style on all pages: https://projectdmc.org/plugins/gallery-block-lightbox/#how%20to%20enqueue%20the%20necessary%20assets%20%28script%20%26%20style%29%20for%20blocks%20outside%20of%20posts%20or%20for%20block%20types%20that%20are%20not%20supported%20by%20default%3F

No it’s just a gallery inside a Generateblocks container at the frontpage. Theme ist TT4.

Then you have to add the following snippet to functions.php:
add_filter( 'baguettebox_enqueue_assets', '__return_true' );