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

It started to happen for me as after updating to 17.1.0

Answer 3

I cannot reproduce your error. However, I did create a project, using your process, that does work on my machine. Perhaps you can see if it works for you? https://github.com/ADefWebserver/BlazorSimpleSurvey/files/8098792/BlazorWebAssembly.zip

Answer 4

please take your time to release visual studio and .net sdk in more relax timeline.
let's say release is every 6 months, aim to high quality release.
the product is not intended for critical production involving death-or-alive of people, so please be relax releasing your product.

Answer 5

Hi, same issue here.
I updated VS 2022 from 17.1 to 17.2.3 and no more WebSocket error :)