Some users report problems with start bot: "dotnet build" failed

[benbrown]

Describe the bug

Some users have reported a problem with the start bot button reporting "dotnet build" failing.

The dotnet build step happens in the localPublish plugin as part of the management of the local runtime: https://github.com/microsoft/BotFramework-Composer/blob/master/Composer/plugins/localPublish/src/index.ts#L173

So far, people who have reported this are building locally and using the browser version. Both are using Windows.

[luhan2017]

@benbrown could you provide more information, could this relate to dotnet version? or nuget package update? could you ask them to check the dotnet version or clean up the nuget packages first?
If that still not works, can we go to the localPublish folder to kick off a manually build and see what is the detailed error message?

[goergenj]

Hi, when hitting "Start Bot" on the Composer (master branch) I get directline 500 error in Emulator. When running "dotnet build" directly in the localPublish folder I get this error: "MSBUILD : error MSB1003: Specify a project or solution file. The current working directory does not contain a project or solution file."
Dotnet Version is .Net Core 3.1.201

[goergenj]

When trying to publish to Azure I get this error and it fails.

[benbrown]

Our theory right now is that both problems are due to your path containing spaces, which is causing our dotnet commands to fail.

We will patch this soon and hopefully this will resolve!

[mareekuh]

@zxyanliu and @beyackle

[mareekuh]

@zxyanliu Yan, do we have a page in our Composer documentation where we can send people?

[zxyanliu]

@mareekuh we have this one on the live side, is recently updated here adding the electrons. Should I add "dotnet build" as a prerequisite for the electrons in the docs? If so, I think I can update this article adding electron with "dotnet build" as a prerequisite.

[mareekuh]

do we have a specific doc that talks about why Composer needs .NET for the time being?