Just had this happen in UE5, FWIW. Everything was working fine, I wasn’t even doing anything with UMG when it went bad. I had an error in my player character saying a Struct wasn’t matching a data table (something like that, I restarted and that went away since it wasn’t true). Upon that restart, I tried to play and got an error about a widget missing a text reference. When I checked it out, I got that same message others posted. I tried deleting the offending file and re-getting it from P4, but it craps out each time I open it. Any way to get around this or do I have to re-make that widget? Luckily it’s not too complicated, but it did have animations which I can’t seem to get working in UE5 now.