Cant save paterns

Was having issues controlling 5 v2 pixelblazes and decided I better update them. They are now all running latest v2.28 firmware. the issue was network related but I’m glad I got them updated finally.

I cant modify existing or open file to import new patterns and save.
Preview shows nothing when editing. “Generating” is shown and save Changes is greyed out. Its been a couple years since I’ve messed with patterns. Am I missing something really basic in UI or did the update not work properly?

I can play the patterns that exist fine. I just cant seem to create new or modify. Tried in Chrome and Firefox.