How to reach a script file in a VM from Powershell runbook

I have a script file in a VM that I want to reach from the azure portal in a Powershell runbook but it can't find the file. The file is manually saved in c:\ of the VM.

Code snippet in azure runbook:

IF ($VmAction -eq "Shutdown") {
     try
    {
         Invoke-AzVMRunCommand -ResourceGroupName $ResourceGroupName -VMName $VmName -CommandId 'RunPowerShellScript' -ScriptPath 'C:\\stopservice.ps1' -ErrorVariable result
         Stop-AzVM -Name $VmName -ResourceGroupName $ResourceGroupName -Force
    }
    catch
    {
        throw "Error: $($_.Exception.Message)"
    }

The command "Invoke-AzVMRunCommand -ResourceGroupName $ResourceGroupName -VMName $VmName -CommandId 'RunPowerShellScript' -ScriptPath 'C:\stopservice.ps1' -ErrorVariable result" can be used on powershell on my computer so I think the issue is somewhere in Azure possibly.

script file (c:\stopservice.ps1):

  try
    {
        Stop-Service -Name SSASTELEMETRY
    }

    catch
    {
        throw "Error: $($_.Exception.Message)"
    }

(ps. the service name is for testing purposes, will stop different service when this works)