Can't use "Call Barring"

hi, when I try to go into "Dial" > the 3 dots thing > Additional Settings > Call Barring, and activate any of the choices, it always tells me "Operation failed, please try again". I'm trying with the (according to google) default password: 1919, also 0000, I also tried changing it to 1234 but nothing works, always operation failed.

anyone know how to fix this? I just want to block all incoming calls (and not receive any type of notification about it)

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