What would you do if you worked at a startup which, after a year and a half of existing and raising a substantial Series A _hasnt even started_ to define what t

What would you do if you worked at a startup which, after a year and a half of existing and raising a substantial Series A _hasnt even started_ to define what the product is? Basically the only reason the startup is alive is a single large customer walked in one day in search of the narrow expertise that we excel at, and gave us a contract. But other than that, there’s zero product effort, and the CEO doesn’t understand he needs to solve customer problems. How would you estimate the chances of success on something like that. I estimate them at roughly zero in spite of the technological prowess, but maybe I’m wrong.