No Option to Upload Additional Files to XML Galley?

Hi!

First time poster, appreciate any help you can provide. I’m running OJS 3.1.1.0, and I’m having a problem uploading additional files, such as images, to my galleys.

Essentially, I have lost the “upload file” option that I use to see in the “Edit a Layout Galley” modal. It just isn’t there anymore. I need to add images to my XML galleys and just…can’t. What am I missing? I can publish my XML’s to the journal just fine, I just can’t add images the way I normally do.

Any help would be much appreciated!