Ok installed the 10.0.40 same problem, 
I have also attached a dump file from a version of CB 10 Pro I tried same problem.
Uninstalled it and deleted its folders and prefs
Im Guessing it has to be something to do with my PC but baffled as to what.
Cubase 10.0.50.301 64bit 2019.12.7 11.25.46.518.dmp (676 KB)
Cubase Elements 10.0.40.284 64bit 2019.12.19 10.48.59.852.dmp (755 KB)