Why does my adavanced custom sensor EXEXML does return 0 ?

So, I've been following this tutorial on how to monitor citrix environnements via PRTG. I've based my self on Pim van Denderen's script and modified it a little bit to get all the datas i needed and to put them like i winted in PRTG :

# Import module
if (-not (Get-module prtgshell)) {
    Import-Module -Verbose prtgshell
    }
	
# Create a powershell session connection to the remote computer
$session = New-PSSession -ComputerName $citrixddc
 
# Run the commands on the remote computer
#Group-BrokerMachine gives us a count already of what we want
$result = Invoke-command -Session $session -scriptBlock {
    Add-PSSnapin Citrix*
    Group-BrokerMachine -Property SummaryState
}

# Start writing output to PRTG.
$XMLOutput = "<prtg>`n"
 
# temporary variable which gives us a table (Name,Count) so we get the count's value of Off, Available,InUse et Unregistered.
$temp = ($result | Select Name, Count)
#for each variable we get the count value
$off = ($temp | Where {$_.Name -eq "Off"}).count
$available = ($temp | Where {$_.Name -eq "Available"}).count
$inUse = ($temp | Where {$_.Name -eq "InUse"}).count
$unregistered = ($temp | Where {$_.Name -eq "Unregistered"}).count
$total = $off + $available + $inUse + $unregistered


#writing xml PRTG 
$XMLOutput += Set-PrtgResult "Desktops: Total" -Value $total -Unit "Desktops"
#Desktops Connected
$XMLOutput += Set-PrtgResult "Desktops: Connected / Active" -Value $inUse -Unit "Desktops"
#Desktops Disconnected
$XMLOutput += Set-PrtgResult "Desktops: Disconnected" $off "Desktops"
# Desktops non enregistrés
$XMLOutput += Set-PrtgResult "Desktops: Unregistered" $unregistered "Desktops"
#Desktops available
$XMLOutput += Set-PrtgResult "Desktops: Available" $available "Desktops"

# Disconnect the session
Remove-PSSession $session
 
#Finish writing to PRTG
$XMLOutput += "</prtg>"
write-host $XMLOutput

I tried to execute it in the powershell commandline and it worked perfectly fine, i gathered all the datas i wanted :

So I've made a custom sensor on PRTG on the remote probe but it looks like it doesn't get the datas bc it only show 0 for each channels i've made... Do you guys have any ideas ? I think it's comming from the account permissions but I'm not sure and I don't really know how to fix it

citrix custom-sensor monitoring powershell prtg