Error as "cannot call a method on a null-valued expression"

[RunOnTheMoon]

This is an amazing module but I meet the following issue when use 'show-anybox' in a foreach method, any ideas for this? thanks a lot.

You cannot call a method on a null-valued expression. At C:\Program Files\WindowsPowerShell\Modules\AnyBox\0.5.1\Public\Show-AnyBox.ps1:1490 char:13

•         $form.Window.Activate()
  

•         ~~~~~~~~~~~~~~~~~~~~~~~
  

  • CategoryInfo : InvalidOperation: (:) [], RuntimeException
  • FullyQualifiedErrorId : InvokeMethodOnNull