It seems that your application is being served via 127.0.0.1 or via an IPv6 host: [::1] , which won’t work on Render. To address this, please ensure that you are binding your service to the IP address 0.0.0.0 rather than using localhost or 127.0.0.1
Another potential cause for this issue could be our automatic port detection not functioning correctly. In such cases, you can try setting the PORT environment variable explicitly to bypass the automatic detection.
Thanks for this. Setting the bind to 0.0.0.0 worked a treat.
Since deploying the API application, I’ve now deployed the Discord bots which tie into the API application and at 8:07 it was fine but at 8:51 it was just “Killed” and I need to redeploy to get it running again: