Problems with get-scheduledtask

I'm monitoring multiple 2012 R2 servers (all deployed roughly at the same time) task scheduler where I use get-scheduled task within Invoke-Command to pull information on specific tasks. On one server however I get errors for some reason.

The parameter is incorrect. +CategoryInfo : Invalid argument: (MSFT_ScheduledTask:Root/Microsoft/...T_ScheduledTask) [GetScheduledTask], CimException  +FullyQualifiedErrorId: HRESULT 0x80070057,GetScheduledTask

Any idea what would be causing this sort of behavior just on that one server where it works fine on all the others.

yaro