I can't get to the Mount Rose Base/Black Market

I beat the 7th gym then I went to the mount rose base with Nora however when we went to the black market I lost to a battle but I have no idea how to get back to the black market. Nora isn’t at the Mount Rose Base anymore. Downstairs of Jade Tower is blocked by rats. I tried doing my back up saves to before I beat the 7th gym but to no avail. I’m stuck, any advice on how to get back there so I can continue the game?

I didn’t even know that led to the black market lol. TYSM!!!