Error with WebSocket

Question

Hello I get the error: WebSocket connection to 'wss://localhost:54970/Dashboard.Server/' failed: Error in connection establishment: net::ERR_CONNECTION_RESET.

I get this on a new project, so what I do is

Start Visual Studio 2022.

Make a new Blazor WebAssembly App.

Set the framework to 6.0 with no Authentication type and the option Configure for HTTPS and ASP.NET Core hosted checked.

Then I run the Application with ISS Express.

Crome gives the error: WebSocket connection to 'wss://localhost:54970/Dashboard.Server/' failed: Error in connection establishment: net::ERR_CONNECTION_RESET.

I have no other programs or services running that could be interfering with the application, what am I doing wrong?

Answer 1

Hi @Nordin van der leije ,

I have reproduced the problem, the issue relates the Visual Studio 2022 17.1 version.

By using Visual Studio 2022 17.1.0 version, after running the application, even the web page can display well, if we check the F12 Console panel, we can see this error:

This issue has been feedback to the Visual Studio forum: WebSocket connection to 'wss://...' failed. ASP .Net Core Web application. After update 17.1. You can also upvote it, and the Visual Studio team will review the feedback and notify you about the next steps.

As a workaround, you can uninstall Visual Studio 2022 17.1.0 version and install a version before Visual Studio 2022 17.1.0, such as Visual Studio 2022 17.0.4 version (I checked this version, and this version has no Websocket connection error).

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Best regards,
Dillion

Answer 2

I updated from VS2022 17.1 to 17.2.6 and the issue persists

Answer 3

The error event is fired when a connection with a WebSocket has been closed due to an error (some data couldn't be sent for example).

Regards,
Patrick

Answer 4

aspnetcore-browser-refresh.js:268 WebSocket connection to 'wss://localhost:44321/Project/' failed:

Failed to load resource: net::ERR_CONNECTION_REFUSED

Microsoft Visual Studio Community 2022 (64-bit) - Current

Version 17.8.6

.NET Framework Version 4.8.09032