Fallacy of oversimplification is also known as Fallacy of Reduction or "Reductive fallacy".
This fallacy is a type of faulty reasoning that involves a faulty causation, it is either about the reduction of a certain effect to a minimum of causes or reducing a complex array of causes to a single one, that cannot take account for all the effects of it or for it at all.
Example: “P1. Poverty is linked to causes of crime.
C. Therefore, if we eradicate poverty, we will eradicate crime.”