They invited him to the White House to finally sign the rare earth minerals agreement, which he had said he'd sign and then renegged two times prior[0]. This was the third attempt by the US to get it signed. During the meeting, he indicated that he would sign the agreement but then not agree to a cease fire, which was the whole point of putting it in place. Naturally, this was a deal breaker for the administration and the meeting ended.

[0] https://x.com/RapidResponse47/status/1895633109649134013