Hello.
I deployed a very simple .NET6 webapi with just one endpoint for testing. My endpoint sends just a hardcoded string response.

I deployed it on railway and I have no build errors.

In the Settings -> Networking section of my project, I have set up a custom domain. Its name is api.mycustomdomain.me and it's registered on Namecheap. I see a green tick icon next to the domain and "Setup complete" text underneath my domain.

My problem is very confusing:

When I hit my endpoint locally via Postman on this address: https://localhost:7135/example

I get my hardcoded response as expected.

When I hit my endpoint via Postman on this address:

https://api.mycustomdomain.me/example

I get this error:

{
    "status": "error",
    "code": 502,
    "message": "Application failed to respond",
    "request_id": "zkO6GklnT4SB1rVYCo3-nQ_2823689937"
}

Thanks for any insights.