CFM creation error. "The command failed. Please try again."

I've only had this problem with one downloadable roster, I tried with a different one and it worked, so I would suggest finding a different roster with the current rosters and try again. There are plenty of different 2016-17 season rosters on the community downloads

So to fix this, do the following. Start a new career with all the settings you want. But instead of doing a player career, pick a coach on a team you don't want to use and don't care if they are no longer in the league. Then start the career at whatever point you want. When it loads in, press down on the right stick and choose create new character. Then you make the player you want, and everything should be fine. Then if you want, you can retire the coach you picked or leave it. This worked for me, hope it works for you

@JD_Rage21 thanks for sharing your experience with our community.

@Phealy48, Sure, If you are playing with a created player, you will have to play as an existing player.

Cheers