magiclink auth returns error `url argument is missing`

I am getting the error url argument is missing when trying to use supabaseClient.auth.signIn() with a magiclink/otp. I get this error in the supabase-js client, but oddly enough the same error occurs when using the Supabase UI to send a magiclink for a user.

This used to work, but I changed my Site URL and it stopped working afterwards. I'm not sure what's wrong, I can't seem to find this error in the docs anywhere.
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