The author wrote a follow-up that was actually a modification to their question, and it was deleted. They have since added the answer, but a moderator deleted it, so I cannot vote to undelete.
As far as I can tell, the only answer was initially a "I have this problem too", which was edited by the answerer to tell that they had found an answer to their question. While that may be the answer to the original question as well, that is not how it's currently presented.
So I see no reason to undelete that answer.
The best solution would be for the answerer to edit their answer into a proper answer, or for us to do so.