Is this legal? Selling occupied house but they won’t leave after sold.

“This home cannot be occupied, this is an investment. The trustee is selling a remainder interest in a life estate. The current occupant of the house has the right to remain in the home until the end of their life. Therefore, you will own the property, but not have access until the end of the life estate.”

https://www.redfin.com/HI/Honolulu/1017-Makaiwa-St-96816/home/88523384