Hours before a Thursday deadline that Elon Musk had given Twitter employees to decide whether to stay or leave their jobs, the social media company appeared to be in disarray. Mr. Musk and his advisers held meetings with some Twitter workers whom they deemed “critical” to stop them from leaving, four people with knowledge of the conversations said. He sent out confusing messages about the company’s remote work policy, appearing to soften his stance on not allowing people to work from home before warning their managers, according to those people and internal emails viewed by The New York Times. All...