Get-PnPSite or Get-PnPWeb error File Not Found

I am using this version of PS:
Major Minor Build Revision
-----    -----   -----   --------
5           1      19041    3570

I have also installed PnP for PowerShell.

I am attempting this:

$tenant = "myCompany"
Write-Host "Connecting to https://$($tenant)-admin.sharepoint.com..."
Connect-PnPOnline -Url "https://myCompany-admin.sharepoint.com"
Get-PnPWeb -Identity "https://myCompany.sharepoint.com/sites/mySite"

But I'm getting an error saying:

Get-PnPWeb : File Not Found.
At line:4 char:1
+ Get-PnPWeb -Identity "https://myCompany.sharepoint.com/sites/MyCompan...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Get-PnPWeb], PSInvalidOperationException
    + FullyQualifiedErrorId : InvalidOperation,PnP.PowerShell.Commands.GetWeb

I've read ALL existing MS documentation and even the PnP docs, but nothing shows how to do it.
My objective is to connect to the tenant (this works) then get a specific site so I can start adding items to it.