@gebo131-
Where are you located?
Per the MGM+ FAQ page (as of Aug 24, 2023 -- check page for updates):
MGM+ is only available in the United States and its territories.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X