Commons "File:Interieur, koor, gebrandschilderd glas, Karel V, detail - 's-Gravenhage - 20365072 - RCE.jpg" is shown as a page in Commons "Category:Grote of Sint-Jacobskerk (The Hague)" although in the file description page it isn't categorised under that category. Please see https://commons.wikimedia.org/w/index.php?title=Commons:Help_desk&oldid=196547320#Need_help_removing_page_from_appearing_inside_category for more details.
I have tried purging the cache, null edits, categorising and re-categorising but to no avail. Finally I tried deleting the file but I was unable. Instead I was given a white screen with the following words: Exception encountered, of type "Wikibase\Client\Usage\UsageTrackerException".
I leave it to you kind folks to suss it out. P.S. I have no idea what to tag this as.