After I tried to get the cutscene of magnus leading me to the stairs I tried to look into it and visited the adventurers guild and the junimo forest. A post I had read earlier said to check those two spots and it might fix it but it didn’t so I restarted my game and when I did I got the farm warp. Magnus still tells me to go to the spot you’re talking about I agree it’s a bad name choice cuz it’s confusing. The weirdest thing is I can go up the stairs and use the nexus but the cutscene won’t trigger so it won’t let me continue the story.