Upon saving a canvas in UI editor I get a "Source Control Down" error message, how do I fix it?

Just like the title says, I get an error message stating “Source Control Down” upon saving a canvas in the UI editor, it seems to save the canvas so its not holding me back but I was wondering if anyone had a fix for it as I dont want it to haunt me later. If you need anymore information let me know and I will try to get it for you.