open a command prompt
set PATH=%PATH%;C:\Program Files\Hugin\bin
and hit enter
logout and then login. Open a command prompt and type path and make sure the path to hugin is there. Start darktable and try your panorama again. Please post whether it worked or not.
In the meantime, I’ll go find a panorama that I did and try and get it running on windows.
I think what is happening is that there are a lot of executables in the hugin directory, such as align_image_stack which I think are being called from the hugin process, but since they aren’t in the path they don’t execute.