I'm pretty new to PowerShell; I didn't even know about the -Full switch.
So, after running the command again, using the -Full switch, I got the following message:
The spooler service is not reachable. Ensure the spooler service is running.
+ CategoryInfo : NotSpecified: (MSFT_Printer:ROOT/StandardCimv2/MSFT_Printer) [Get-Printer], CimException
+ FullyQualifiedErrorId : HRESULT 0x800706ba,Get-Printer