errors during simulating result

Hi, I’m Aida, final year undergraduate electrical engineering student, and currently I’m working on my final year project.
I’m using Wolfram Mathematica and system modeler in proving my circuit.
however, there are some errors that I do not know how to solve it.
is there any suggestion in solving this matter? i need help :(]1

Does your circuit have a ground component?
Can you attach the model?

It will likely be impossible to diagnose with just that picture. A short notebook showing the problem could be attached to the question.