I've thought I'd start experimenting with Microsoft Edge and UI2 seems to be giving a strange error. This is happening on three different PCs and Chrome, Firefox and IE all run without the error. It's just Edge that seems to be playing up.
Can any kind soul point me in the right direction here?
Something got corrupted, most likely. Or you may have a browser extension that is misbehaving. Re-download and re-extract the files, overwriting all, then force a full refresh of the page (Ctrl + F5 or clear browser cache). If this doesn't help, check your Edge extensions.