What kind of sharing do you refer?

It looks working fine at Mojave.

I'm sharing my mudfish connection with my ps4 with full vpn mode, every time I tried to connect it shows me A dns error has occurred from sharing,

1. System Preferences...
2. Network
3. Advanced...
4. DNS - Click the + button below DNS Servers to Add a DNS server address then put any DNS Servers to set it manually what you desire https://en.wikipedia.org/wiki/Public_recursive_name_server

https://mudfish.net/forums/6/topics/54681