"The project doesn't know how to run the profile MauiApp.WinUI"

Question

I am trying to get started with a brand new .NET Maui application. Upon creating the project, it has a single project for the MauiApp, and another project named MauiApp.WinUI. When I try to run the the app on my Windows 10 device, I get the error: "The project doesn't know hot to run the profile MauiApp.WinUI". I am not sure what to do in order to fix this. Any suggestions?

Mose

which exact version of vs you are using? – Kordula

I used Visual Studio Community 2019 Preview (16.11.0 Preview 2.0) to get the Maui templates to appear. That is the version I used when this issue occurred as well. – Mose

Answer 1

In my case installing Single-project MSIX Packaging Tools solved the problem.

Just in case, I already had Project Reunion (Preview) installed.

Refurbish

it works for me too, but why we need these extensions? – Rive

Welcome to Stack Overflow. I moved the links inline to aid in readability. Please review the markup so you can add links to your answers in the future. – Byrn

Also, I used the same URLs you had defined, but the first URL doesn't actually point to a tutorial, but simply references the Single-project MSIX Packaging Tools referenced by the second link. Can you correct that URL? – Byrn

I have updated the link of "Single-project MSIX Packaging Tools for VS 2022 preview" package. – Capone

@ChinmayT - the question is tagged visual-studio-2019 though. Better to add the link rather than replace it -- but it's already there anyway in this answer of Shidouuu. – Accelerando

Answer 2

As of 7/14/21, you should use the Single-project MSIX Packaging Tools for VS 2022, not the one for VS 2019.

Ascogonium

Why is this still in preview as of Aug 2022? VS 2022 has been out for over 6 months... – Brodench

Answer 3

I was under the impression after watching a few of the community hangouts that all you needed to do was run the maui-check tool.

It appears that there are other dependencies beyond the tools capabilites, or that it doesn't check, which is a little annoying. But are listeed in the installation docs.

Single-project MSIX Packaging Tools

Project Reunion (Preview)

After installing these everything worked fine.

Distorted

Answer 4

From VS 2022 preview : I just deleted the file launchSettings.json and the app launched !

Capsular

Answer 5

I installed Single-project MSIX Packaging Tools extension and Project Reunion extension (preview for VS2022). But this was not enough, I still could not start the app.

Then I installed MSIX Packaging tool from MS Store, and it finally worked.

Here's my launchSettings.json file:,

"profiles": {
    "TestWinUI": {
      "commandName": "MsixPackage"
    }
  }

Macerate

Answer 6

this also worked, edit launchsettings.json:

"profiles": {
    "UnoApp1.Windows (Unpackaged)": {
        "commandName": "Project"
    },
    "UnoApp1.Windows (Package)": {
        "commandName": "MsixPackage"
    }
}

}

Disunity