After starting script on my local host, it disconnects from anything

[Ciugam]

Hi, I like the idea of the repo. My goal is (example): Smartphone/PC/... (tailsc.) --> home local server (tailsc.-exit node) --> mullvad -> internet

I've configured IPs of tailnet (included local server) and removed ipv6 flags in config. I use ufw for other things, but I didn't touch it for this thing. nftables already installed, and mullvad set up correctly. I use this machine as exit node and subnet for tailscale. When I start the script, the host disconnects and I lost all connections. I can't ssh locally, neither on tailscale. Suggestions? Thanks in advance.