Hi guys, same bug here! Yesterday I tried to share my recent custom roster, but with no success (I'm getting same error message as o1executor). I thought that is caused by some not permitted word in description of roster but no, even with "empty description" I got same message. Then I tried dozens of other name for saved file/roster which I want to share, but still getting "upload failed - you need to choose a different name ..." (I tried to used name convention of my previous shared rosters "Hockey Project").
I even tried to play some online games to find (which took me to subscribe for PS Plus after months :D), whether my PSN/EA ID username is not "that issue" (but i shared few other custom rosters regularly without issue), just to find that I'm able to play online and my username is not that issue, so it has to be something on EA side with "verification engine" of roster name/description.
EA_Aljo do you have any updates of this?