Unable to add pictures into post

I’ve been using worpress for years. Without doing any changes to my site (as far as I am aware of), as of today, I am unable to add images into posts.

When I add a block, normally I would get buttons for ‘add, upload, select’ (or something of that kind). Now, I do get a placeholder for the block, but the buttons for adding a picture do not appear. I can drop images into the box.

I’ve tried deleting cache, but that didn’t work.

Anyone have any suggestions?