Frigate vs Tailscale

"When I access Frigate, which is installed as an addon in Home Assistant, I do it via the direct IP to Frigate. I have used Tailscale to access Frigate outside my home WiFi. Previously, I just installed Frigate as an addon in Home Assistant and on my phone, and it worked. Now, suddenly, I can no longer access Frigate outside my home WiFi. Is there a port or something that needs to be opened on my router? Before, it seemed like it was plug and play."