Getting 403: Forbidden when using Tailscale

Each time I try to open the HA page through my Tailscale IP I’m getting the error:

403: Forbidden

This happens both on my local network, and from the outside through mobile app. Any ideas? I suppose it may have something to do with configuration.yaml, but I’m not sure what should I add/change there to make it work.

There is no local and outside network when using VPN. There is the VPN network.
You might need to allow that as an external network.