I, too, am having this problem. I followed the instructions in the document you reference, Jonas, but when I get to the image at the top of page 11, my window for the PET Granulate Production Process, my Provider column is completely blank. It does not match the image at the top of page 11.
If I have to start over from the beginning, I can do that, but I'd prefer to understand what the problem is first. Thanks.