Color of "edit record modal" is not white anymore but dark blue in my case and therefore not workable

When I add a new block to my app (list details, no matter which one) the modal for editing a record gets unreadable because of the colors.
See picture

This happens when I add a block where the colors of the background automatically change when I connect the database to the block.

When I manually change the background color of the block (f.i. with the new table block) the color of the modal stays white