Trouble installing Windows 10 on Parallels 18

Hi Folks, i have a problem. To use my macbook with a medical device that only is compatible with windows up to 10 i bought Parallels 18 for Mac and a Windows 10 License. Installing Paralles was no problem at all. Initially i could start with setting up/installing windows 10, but now the process always stops at the point shown in the screenshot. As my system runs in German so is the text shown, i try to translate:

"The Setting<DiscConfiguration> from the answer-file for the unattended istallation could not be used/activated....

Anybody with an idea how to go on?