UPDATE 17/3/20: Two Point Hospital's eco-themed Off The Grid expansion has been delayed, and is now scheduled to launch on Steam next Wednesday, 25th March.
Developer Two Point Studios blamed the delay on a crash unearthed by QA testers, saying "we're simply not happy to release [Off The Grid] when there could still be a major issue there, it's not fair on you and it doesn't represent the amazing work the team have put into it."
"Naturally we've had the whole studio trying to reliably reproduce this issue," the developer wrote in a new blog post, "It's been a slippery little blighter, but our awesome team believe they've found the cause and are now working on a fix for it, we just need some more time to make sure this issue won't affect anyone."