Scheduled task with PowerShell cmdlets hangs in "Running" status. Notification email is not send to the specified mail account.
The issue considered to be a software issue and will be fixed in future product updates. Internal request ID is PPPM-875 . The fix is released in Plesk 11.5.30 MU#33.
Please apply the latest Plesk microupdate. If by some reason it is not possible, follow the instruction below: