Sorry but just , it's not me on youtube ^^ https://www.youtube.com/channel/UCMiNt-X_-FRnBcPPuk5ikKA

You need to enter "channel/UCMiNt-X_-FRnBcPPuk5ikKA", on YT multiple users can have the exact same name so you need to enter the URL instead

not a bug, you just put the wrong thing into your profile.