Documentation should point out that --ignore-failed-sources could be required

[jacdavis]

I personally can't install this because of a failed auth into a nuget server. This could be my configuration. Sunanda Balasubramanian pointed out that the upgrade assistant docs do call this out as being possibly needed, but try-convert does not.

[sayboltm]

Agree, this happened to me too, took a little while to figure out since the nuget message is so generic:

The tool package could not be restored.
Tool 'try-convert' failed to install. This failure may have been caused by:

* You are attempting to install a preview release and did not use the --version option to specify the version.
* A package by this name was found, but it was not a .NET tool.
* The required NuGet feed cannot be accessed, perhaps because of an Internet connection problem.
* You mistyped the name of the tool.

For more reasons, including package naming enforcement, visit https://aka.ms/failure-installing-tool