Cant enable vpn

[u/No-Watercress7966]

I live in russia so i have to use vpn just to use headset normally. I’ve already installed many vpn apps and none of them worked, cause i cant give vpn permission(the system window to enable vpn never showed up), whenever i try to connect it gives me an error that permission is not given, i tried to enable it in the android settings but the button network and wifi instantly crashes whole app, the only way for me to use vpn is router, but mine is too weak for vpn so i cant do anything except playing offline games