seriously still working?

[unconscious]

so i decided to do the seriously glitch on my main acount and have run into a problem.... it wont work

first of all ive seen countless youtube videos on how to do the glitch and ive done everything perfect dozens of times. the start screen freezes for a second, the prefered character is changed to the seriously acount. and it wont unlock, ive tried warzone and annex, 1 round and 3 round, losing and winning, signing in after its recommended and before its recommended. and ive also done it exactly as shown on videos.
now i know its not my xbox itself because before i decided to glitch seriously i wanted to just glitch the map achievements for subway and the other dlc map achievements. the glitch worked fine on the same acount and the same xbox. then i thought maybe its because i already glitched it once but i also tried it on my friends acount and couldnt get it to work.

is there something i dont know about that i should be doing or checking?
and as of now does any one know if the glitch is even still working?