✅ Getting error when installing CSharpier globally

C:\Users\mango\AppData\Local\Temp\c9a0f2f7-6b74-4505-bfe2-8c9a0efe4d18\restore.csproj : error NU1301: Unable to load the service index for source https://nuget.telerik.com/v3/index.json.
The tool package could not be restored.
Tool 'csharpier' 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

C:\Users\mango\AppData\Local\Temp\c9a0f2f7-6b74-4505-bfe2-8c9a0efe4d18\restore.csproj : error NU1301: Unable to load the service index for source https://nuget.telerik.com/v3/index.json.
The tool package could not be restored.
Tool 'csharpier' 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