I have a custom post type called “kunstwerken” (art). I use ACF to display the correct fields on this groups and everything works as expected.

However, I would like to filter the custom post list in the admin area by a custom field. This field is a text field and called “kunstenaar” (artist).

I have tried several options as found on Stackexchange but can’t seem to get it to work.
Can anybode help me out here?