Topic on Project:Support desk

I can't seem to add a wikipedia sitelink to my item. When i paste it in (the wikipedia page link) 'save' remains greyed out and unclickable. I've googled the problem but haven't found a similar issue from anyone.

I'm talking about the wiki media boxes on the right side of the item screen - 'Wikipedia (0) entries'

What is "my item"? How to get to an "item screen"? Please provide steps to reproduce the problem from the beginning, plus information which MediaWiki version you're running. Thanks!