Hi there,
I was recently creating a new MyLeague file, with new teams and everything that goes with it, until all of a sudden the message "There was a problem saving the team/arena/uniform. Please try again." popped up on each of the sections. And from that point, the game just doesn't let me customize anything at all. So after trying to work around it, I decided to start from scratch again so I created a new file. Turns out I can't save any file either, if I use the "Save As" feature I can see the file pop up for a second and then dissapearing. Next thing I tried was to create a Season file to overwrite later. Same thing. I tried the same with MyCareer, MyGM, Playoffs with the same outcome. Last thing I've tried was to overwrite an already existing file that was there before the glitch started happening, but it just deleted the old file and didn't replace it with the new one. So basically the only files I can save are the ones that were there before all of this happened.
Also, I've contacted 2KSupport (I know lol), re-installed the game, verified the game files, etc.
I don't know what else I can do to make this work, I feel like I've tried everything.
TL;DR: Can't seem to save any file at all, or customize a team.