I also am facing the same problem here, here is my part of the code:
I also have the same error- has anyone found an answer?
Thank you
Image
I tried again I don't know if you can see it better. I am pretty new to mathematica but there seems to be no easy way of copying and pasting so I uploaded the picture ][1] Here is the input if the image still couldn't be uploaded: In Starting Feynman rule calculation. Expanding the Lagrangian... Collecting the different structures that enter the vertex GetFC::Head : Wrong Head in FC. Symbol $Abofrted
Your image appears to be missing. If you have Mathematica code, include that, not as an image, but as a code block.
