Model param.grad is None, how to debug?

[Aman_Chaurasia]

sir i have posted a question, can you please help me
here is the link:

I am loading a .pth model but when i try to print the params, it gives me error. error is in the image attached. please help if anyone( @ptrblck_de )knows how to remove this error

@ptrblck_de sir can you help