A billionaire AI boss sued a beloved California firefighter after claiming he damaged his $40 million Malibu beach mansion while installing a system designed to protect the home from wildfires. Daniel Nadler, 42, the CEO of OpenEvidence — a Google-backed artificial intelligence company described as “ChatGPT” for doctors — filed the lawsuit Tuesday morning before it was mysteriously withdrawn hours later. The lawsuit, which The Post understands will be refiled, accused firefighter Robert Milstein of smashing his “heavy vehicle” into the exterior wall of the sprawling oceanfront estate, which Nadler claims slashed the home’s value by “millions.” The architect-designed beachfront home features rare rammed-earth walls meant to resemble weathered coastal stone. Nadler’s $40 million Malibu mansion CA Post Milstein, who runs SoCal Fire Supply , had been setting up a fireproofing system at the mansion on October 9, 2025.…