docs(common): Improve NuGet troubleshooting info (#1351)

* docs(common): Improve NuGet troubleshooting info

* Update common-features/icons.md

Co-authored-by: Yordan <60105689+yordan-mitev@users.noreply.github.com>

* Update installation/nuget.md

Co-authored-by: Yordan <60105689+yordan-mitev@users.noreply.github.com>

* Update troubleshooting/nuget-feed.md

Co-authored-by: Yordan <60105689+yordan-mitev@users.noreply.github.com>

* Update troubleshooting/nuget-feed.md

Co-authored-by: Yordan <60105689+yordan-mitev@users.noreply.github.com>

---------

Co-authored-by: Yordan <60105689+yordan-mitev@users.noreply.github.com>

Author: dimodi

common-features/icons.md

@@ -35,6 +35,8 @@ The Telerik Blazor components use built-in icons with the help of two NuGet pack
 * `Telerik.FontIcons` - defines the `FontIcon` `enum` for easier usage of built-in **font** icons
 * `Telerik.SvgIcons` - defines the `ISvgIcon` interface and the `SvgIcon` static class for built-in **SVG** icons
 
+>tip Unlike the `Telerik.UI.for.Blazor` package, the icon packages are available from the `nuget.org` source. Keep this in mind when using [`packageSourceMapping`](https://learn.microsoft.com/en-us/nuget/consume-packages/package-source-mapping).
+
 To use the icons, import one or both namespaces, for example in `_Imports.razor`:
 
 >caption Register Telerik Blazor icon namespaces

installation/nuget.md

@@ -127,6 +127,12 @@ To use a `nuget.config` file for the Telerik feed, you need to:
          </packageSourceCredentials>
         </configuration>
 
+
+## Troubleshooting
+
+For tips about common pitfalls when working with the Telerik NuGet feed, see the [NuGet Troubleshooting]({%slug troubleshooting-nuget%}) article.
+
+
 ## Next Steps
 
 @[template](/_contentTemplates/common/get-started.md#after-install)

troubleshooting/nuget-feed.md

@@ -14,6 +14,7 @@ This article provides ways to fix the most common problems we have had reported
 
 * [I do not see the Telerik Packages](#i-do-not-see-the-telerik-packages)
 * [Error 401 Logon failed.](#error-401-login-failed)
+* [Error `Unable to find package`](#unable-to-find-package)
 
 ## I do not see the Telerik Packages
 
@@ -63,6 +64,18 @@ Add-Type -AssemblyName System.Web
 ![Powershell Encoding](images/encode-passwords-with-powershell.png)
 
 
+## Unable to Find Package
+
+The error `Unable to find package` can imply the following:
+
+* If the error occurs for the `Telerik.UI.for.Blazor` package, the [Telerik NuGet source]({%slug installation/nuget%}) may not be added or enabled. The possible causes are:
+   * Missing configuration in the `NuGet.Config` file (or Visual Studio).
+   * The correct `NuGet.Config` file is not used. This is common in Docker scenarios and the solution is to copy the `NuGet.Config` file explicitly during build. See the forum thread about [private NuGet feeds in Docker](https://www.telerik.com/forums/can-the-telerik-blazor-and-asp-net-tools-be-used-in-a-docker-container) and [some DevOps examples](https://github.com/LanceMcCarthy/DevOpsExamples)).
+* If the error occurs for the [icon packages (`Telerik.FontIcons` and `Telerik.SvgIcons`)]({%slug general-information/font-icons%}), the NuGet client is not using `nuget.org` as a NuGet source. The possible causes are:
+   * The NuGet source is disabled.
+   * The [`packageSourceMapping`](https://learn.microsoft.com/en-us/nuget/consume-packages/package-source-mapping) forces the NuGet client to search for the icon packages in the `nuget.telerik.com` source. However, the icon packages are published on `nuget.org`.
+
+
 ## See Also
 
 * [Setup of the Telerik Online Private NuGet Feed]({%slug installation/nuget%})