@tflidd thanks again for your help with this. After much more frustration and App elimination I was no further to resolving this. Eventually I stripped everything back and found the problem in my reverse-proxy settings, which I still don’t really understand give it worked in every browser I’d tested other than Edge. It’s working on that now, running 21.0.4 and most of the Apps above, although I did review my usage of them all and deleted a few no longer required.