I hate to ask this because I have beaten both games completely already, but it's the second time this has happened and I don't remember how I fixed it the first time.
When your in Lemuria for the first time and Piers runs off crying about his mom, you are told to go see Lunpa in his tower. Now, I know you must use lash, but I did that first before I clicked the door. Lunpa said something to me when I clicked the door and I went through the text too quickly. I climbed the rope and went through the window and upstairs but Lunpa isn't there. I can't leave Lemuria, find Piers, or talk to Lunpa to recieve Grind.