CORS + 401 Error with Appwrite Authentication

⁠I'm getting a CORS + 401 Error with Appwrite Authentication

Access to fetch at 'https://cloud.appwrite.io/v1/account/sessions/email' from origin 'https://my-custom-subdomain.appwrite.network' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. POST https://cloud.appwrite.io/v1/account/sessions/email net::ERR_FAILED 401 (Unauthorized)

Framework: Next.js 14 with Appwrite SDK Authentication: Email/Password using account.createEmailPasswordSession() Environment Variables: NEXT_PUBLIC_APPWRITE_ENDPOINT=https://cloud.appwrite.io/v1 NEXT_PUBLIC_APPWRITE_PROJECT_ID=my-project-id

My Integrations > Platforms

Name|Platform type|Identifier|Last updated
My Project Name|Web|my-custom-subdomain.appwrite.network|3 days ago
localhost|Web|—|A few seconds ago

It works well in localhost.

What I've tried

https://appwrite.io/blog/post/cors-error

So, how to fix it?

I'm having trouble connecting Github to my Appwrite instance, and I've followed the tutorial exactly: https://appwrite.io/docs/advanced/self-hosting/configuration/functions. It doesn't work.