Why Cannot Seasonpass 9.3 Save My Signatures on my ATV 5.2.1?

The process has worked flawlessly on my PC for older non-jailbroken versions using 9.3.

I decided to use the same procedure to save the signatures on my already jailbroken ATV 5.2.1.

The saving process runs almost to completion, but finishes with the message:  “Seasonpass was unable to save signatures for this Apple Tv.”

I’ve repeated the process numerous times, but always get this same message.

What does this mean?  Does it make sense? 

I should be able to save the signatures for this version… and every version with 9.3, correct?