Of course it does! They made a false claim. Unless he specifically waived his right to contest that claim, they need to prove their claim.
“At the time of delivery, the Proposal was also subject to the completion of financing and business due diligence, but it is no longer subject to financing as a result of the Reporting Person’s receipt of the financing commitments described below and is no longer subject to business due diligence.”
He signed it.
There is a reason why the legal experts and law professors out there believe it’s an airtight case.