MagicLink err_invalid_url

When working locally from my desktop, sending a magiclink via auth.api.signInMagicLink() is working perfectly.

But when I go to commit my changes which updates the development servers version, it returns ERR_INVALID_URL, and it's returning it from node_modules/better-auth/dist/plugins/magic-link/index.mjs:144:31

I'm not sure what I'm doing wrong, where is baseUrl supposed to come from?

My devserver is a subdomain which is handled by Caddy doing a reverse-proxy.
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