For #2, why did you enable that? This means you need to enable remote resources, like a remote shared drive or something like that. So you make a double hop(in Microsoft terms). You hop once to your target and once again to your remote shared drive. WMI does not allow this for security policy reasons so we have to do something else when you select that.
Try unchecking it and running it and see if that helps. If not, open a TAC case and someone from support can assist you.
Thanks for your response. I tried the workflow without checking that too. But since it didnt work, I assumed that perhaps that checkbox enables running powershell scripts on remote targets too, I wasn't aware that the implications for that checkbox relate to other shared resources.
I just tried running the Get-Date command without the option for remote resources and it failed again.