Who is asking for their money back? Why?
The team is negotiating and trying to resolve the issue with one of the investors who no longer want to wait for the completion of the project and asks for their money back
It is very strange, why first invest and then demand money back. It looks like it's just the machinations of competitors or scammers.
This is not like the machinations of competitors, most likely a person needs money urgently or is not ready for long-term investment.
Panic and hasty decisions are a bad adviser, for example, this story resembles a not entirely serious attitude on the part of the investor, first he invested money, then he changed his mind.