so I only had 1 nsp before, and everything was fine.
Got the new smash file, so I updated sx os through the switch, then did a firmware update to 9.1.0
Then took out the sd card, pasted the new smash game, along with mario party and put it back in and was giving that problem. What I'll do is delete that nsp, and the nintendo folder, and remove smash and try. Once I'm on there, I will FTP smash onto my switch and see if it works.