Powershell ERROR

[juansonnn]

I've copy and paste in powershell just the payload. It process it but at the end it gives me the following error:
`
System.Management.Automation.PSCustomObjectSystem.Object1Preparing modules for first use.0-1-1Completed-1 Method invocation failed because [System.RuntimeType] does not contain a x000D__x000Amethod named 'replace'.x000D__x000AAt line:1 char:2005_x000D__x000A_+ ... Name "fx" -names BCs;$mx=$mx.replace("BCs", "Win32Functions");[byte[] ...x000D__x000A+ ~~~~~~~~~

</S></Objs><Objs Version="1.1.0.1" xmlns="http://schemas.microsoft.com/powershell/2004/04"><Obj S="progress" RefId="0"><TN RefId="0"><T>System.Management.Automation.PSCustomObject</T><T>System.Object</T></TN><MS><I64 N="SourceId">1</I64><PR N="Record"><AV
>Preparing modules for first use.</AV><AI>0</AI><Nil /><PI>-1</PI><PC>-1</PC><T>Completed</T><SR>-1</SR><SD> </SD></PR></MS></Obj></Objs>`


Any clues??