SP2013: Site Locked after interrupting Backup

Hi,
i Had to interrupt a Backup and that got my site stuck in Maintenance mode.
You have a red bar at the top of your site warning you and your site is grayed out on Read Only.

Here is how to fix it.
Open SharePoint PowerShell

Open SharePoint PowerShell

$Admin =  new-object Microsoft.SharePoint.Administration.SPSiteAdministration('http://YourSite.Domain.com') (Hit Enter)
$Admin.ClearMaintenanceMode() (Hit Enter)
$site.MaintenanceMode (Hit Enter)

After this I went back and it was unlocked