As the title says, add citation (or any other functions, for that matter) is not working. It just doesn't do anything. Remains as is.
Idk if it helps at all, but that is my current screen.

I am unable to get a debug ID, so have a look at my debug output view, maybe that will provide some clarity.

https://s3.amazonaws.com/zotero.org/images/forums/u15599718/vizsg4ahfsgcygo23l9a.png

https://s3.amazonaws.com/zotero.org/images/forums/u15599718/w16lnxsebpome14mgmp8.png