Microsoft project open files using powershell - powershell

Question

I'm having problem opening project file from Project Online (server). I want to save all online files locally. If I open project first through Desktop client and try to open that file using function FileOpenEx it works (maybe because it opens draft?)
Also I've tried full URL
$Project.FileOpenEx(".../pwa/_api/projectdata/Projects/$name",$true)
But it started import wizard
This is the code:
$csv = Import-Csv '...\ProjectNames.csv'
$Project = New-Object -ComObject msproject.application
$csv | ForEach-Object {
$name=$_.ProjectName
Write-Output $name
$Project.FileOpenEx("<>\$name",$true)
$Save=$Project.FileSaveAs("...\Desktop\ProjectData\$name.mpp")
Get-Process | where{$_.ProcessName -like "*winproj*"} | Stop-Process
}
I get this error when I try to open Project Online projects.
ForEach-Object : Exception calling "FileOpenEx" with "2" argument(s): "The remote procedure call failed. (Exception from HRESULT: 0x800706BE)"
At ...\MigrateProjects.ps1:26 char:8
+ $csv | ForEach-Object {
+ ~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [ForEach-Object], MethodInvocationException
+ FullyQualifiedErrorId : COMException,Microsoft.PowerShell.Commands.ForEachObjectCommand
EDIT: I've changed code to use shell like pointed in comments and it opens now. But when I try to save file sometimes it doesn't return boolean value and just stops. It happens on different projects, but it did save all my listed projects once. But when I want to repeat saving process it just exits at FileSaveAs. And I can't figure out why.
$csv = Import-Csv '...\ProjectData\ProjectNames.csv'
$ProjServer=".../sites/pwa/"
$ProjShell = new-object -comobject wscript.shell
$ProjShell.Run("winproj /s $ProjServer", 1,$false)
Start-Sleep -s 15
$Project =[System.Runtime.InteropServices.Marshal]::GetActiveObject("msproject.application")
Try{
$csv | ForEach-Object {
$name=$_.ProjectName
Write-Output $name
$NameWithoutSpaces= $name -replace '\s','_'
$Project.FileOpenEx("<>\$name",$true)
$Save= $Project.FileSaveAs("...\ProjectData\$NameWithoutSpaces.mpp")
Write-Output $Save
}
}
catch{
Get-Process | where{$_.ProcessName -like "*winproj*"} | Stop-Process
$error[0].Exception.GetBaseException().LoaderExceptions
}
Get-Process | where{$_.ProcessName -like "*winproj*"} | Stop-Process