I checked my add-ons in settings to see what was wrong as I noticed the icons were missing. Upon looking at the proper tab, everything "could not be verified" (including themes) even though everything was working perfectly within 24 hours prior to the issue arising. When trying to reinstall anything from the extension store, all I receive is a "this appears to be corrupt and thus will not install." Clicking the "more information" button on any/all affected add-ons reveals that everything is unsigned. How do I alleviate this?