Starting in 2020, the Faculty imposed a freeze on fundraising and hiring. In late 2023, the Faculty of Philosophy decided that the contracts of the remaining FHI staff would not be renewed.
Can anybody offer insight into the reasons here? Obviously there is not going to be an objective answer to this question. And that is probably why the linked page does not try to give an answer.
I'm assuming lack of funding wasn't the problem, since they froze fundraising (if the inability to raise funds was the problem it is unlikely that they would have done this).
Edit: looks like he got smeared in January of 2023, but that doesn't explain the freeze starting three years earlier: https://news.ycombinator.com/item?id=40066352