Set-PnPListItemPermission - The 'name' argument is invalid

[prossum]

Hi, I try to set unique permission on a list item for the owner group.

$lib = "MyLib"
$itemId = <itemid>
$ownerGroup = Get-PnPGroup -AssociatedOwnerGroup
$ownerRole = Get-PnPRoleDefinition | Where-Object {$_.RoleTypeKind -eq "Administrator"}
Set-PnPListItemPermissions -List $lib -Identity $itemId -Group $ownerGroup -AddRole $ownerRole -ClearExisting -SystemUpdate

But I get an error:
The 'name' argument is invalid.

Does anyone have an idea what is wrong?

[KoenZomers]

I can reproduce this issue. Created an issue for it at #1196. Let's continue tracking and discussing this topic there. Closing this discussion.