Cloudflared "blocked request" in Tutorial

[Ferretsroq]

In Step Four of the tutorial we are supposed to run the demo activity in discord. However, when I do this, I get the following error message in discord, as black text on a black background:

Blocked request. This host ("accordance-carried-norfolk-scholarship.trycloudflare.com") is not allowed.
To allow this host, add "accordance-carried-norfolk-scholarship.trycloudflare.com" to `server.allowedHosts` in vite.config.js.

There's nothing in the tutorial about touching that config file, and I thought that's what the URL Mappings were for anyway. I can make it work by adding the allowed host, but changing that every time a new tunnel is made and duplicating that in the url mappings seems strange.