Copernicus 30m Global DEM hangs on gpt DEM-Assisted-Coregistration


I am trying to use the Copernicus 30m Global DEM in DEM assisted Coregistration, but the step just hangs indefinitely and it is clear it is not doing anything. It doesn’t seem to matter what imagery is used. I am using the most up to date SNAP 9.1. It works fine with SRTM though, for example.

If this has been posted elsewhere please point me to the topic as I can’t find anything.