Because you used sigpatches, had you never used sigpatches your legit purchases would have worked. However, you added sigpatches, in this case the wrong ones, so none of your sig checks worked with the cfw you were running resulting in errors. This is your error, hence why the vast majority of people who upgraded to 9.1.0 had no issue, if it was an Atmos error with 9.1.0 everyone would also have the same issue. They don't.Even with the newest sigpatches:
The Homebrew menu NSP doesn't launch „Unable to start software. Return to the HOME menu and try again.“
My legit BOTW catrige doesn't launch „Unable to start software. Return to the HOME menu and try again.“
My legit bought eshop copy of Xenoblade Chronicles 2 doesn't launch „Unable to start software. Return to the HOME menu and try again.“
Nothing pirated... How to you explain this, smartass?
Basically the sigpatches are different depending if you run fusee or hekate and the cfw you are running, make sure you get the correct up to date ones next time and you won't have an issue, like everyone else.
