I was trying to use this to learn about SSE. I cannot get the server to response, but there are no errors. Any hints? Hoppy to take on a PR to update the documentation if it's just Operator error. I just don't know what the error is.

dotnet run info: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[63] User profile is available. Using 'C:\Users\FinchMik\AppData\Local\ASP.NET\DataProtection-Keys' as key repository and Windows DPAPI to encrypt keys at rest. Hosting environment: Development Content root path: C:\Users\FinchMik\Test\Demo.AspNetCore.ServerSentEvents\Demo.AspNetCore.ServerSentEvents Now listening on: http://localhost:5000 Application started. Press Ctrl+C to shut down. info: Microsoft.AspNetCore.Hosting.Diagnostics[1] Request starting HTTP/1.1 GET http://localhost:5000/sse-heartbeat - - info: Microsoft.AspNetCore.Hosting.Diagnostics[2] Request finished HTTP/1.1 GET http://localhost:5000/sse-heartbeat - - - 404 0 - 36.3699ms info: Microsoft.AspNetCore.Hosting.Diagnostics[1] Request starting HTTP/1.1 GET http://localhost:5000/sse-heartbeat.html - - info: Microsoft.AspNetCore.Hosting.Diagnostics[2] Request finished HTTP/1.1 GET http://localhost:5000/sse-heartbeat.html - - - 404 0 - 2.8038ms

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