Accessing TFS url from PowerShell gives TF10121 error

Question

Hi,

1) I am trying to access TFS path from Powershell

2) I am trying add a label to it using the tf.exe label command, but I am seeing the following error

tf : TF10121: The path 
'[Uri]https://sampleurl.net/tfs/E11/Folder/Folder1' is 
not found or not supported. Type or select a different path.
At line:13 char:1
+ tf vc label $labelName [Uri]$TpcUri
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (TF10121: The pa...different path. 
   :String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError

I am using the below script

[Uri]$TpcUri = 'https://sampleurl.net/tfs/E11/Folder/Folder1'
Write-Host $TpcUri
$labelName = 'abc'

Set-Alias tf "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer\tf.exe"

tf vc label $labelName $TpcUri

Can someone please help me on how to get rid of this error

Thanks,

Santhosh