Brother in law got scammed out of a lot of money. Is there anything he can do?

I'm posting on behalf of my brother in law because he doesn't use Reddit, but as a disclaimer, I know nothing about crypto currency and am just trying to help him.

As far as I understand, he put a smaller amount of money into a crypto app (?) and was able to withdraw it without issue, but is now unable to withdraw a significantly larger amount of money. He wants to know if there's anything legitimate about this, and if there's anyway to get his money back. I've attached his screenshots of his money transfers and attempts to pull his money back out. Thanks in advance!