Compare-Object error at MultiPoolMiner.ps1
```
Compare-Object : Cannot bind argument to parameter 'ReferenceObject' because it is null.
At C:\MultiP00Lminer\MultiPoolMiner.ps1:531 char:130
+ ... pare-Object ($_.Combination | Select-Object -ExpandProperty Device_Na ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : InvalidData: (:) [Compare-Object], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.CompareObjectCommand
```