CI down for VS2015 / hanging on dmark

VS2015 builds fail with license error

https://www.graphics.rwth-aachen.de:9000/OpenFlipper-Free/OpenFlipper-Free/-/jobs/57046

calling: "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\devenv.com"

Microsoft Visual Studio 2015 Version 14.0.25420.1.
Copyright (C) Microsoft Corp. All rights reserved.

The license for Visual Studio has expired.

Your license for this product is expired and could not be refreshed. Please connect to the internet to continue to use this product.ERROR: Job failed: exit status 1

Also, the build jobs on dmark hang before doing anything: https://www.graphics.rwth-aachen.de:9000/OpenFlipper-Free/OpenFlipper-Free/pipelines/7423/builds