Please act as a legal assistant. Highlight key rulings and arguments in the case below. 

Summarize the following text in 3 bullet points.

Respond in a warm, casual tone when explaining the legal concepts to make them accessible to the client.

Case Details:
The plaintiff filed a motion for summary judgment claiming breach of contract. The defendant argues that the contract was void due to mutual mistake regarding the property's zoning classification. The court must determine whether the evidence shows a genuine issue of material fact. 