I'm glad you like the game! Sorry for the trouble.
What you're supposed to do there is go up to the top of the pass, then try jumping across. I took a look at the dialogue that appears if you try to do the jump first, and sure enough, there's no dialogue indicating that's where you're supposed to go. I've updated the dialogue so that's clearer in future updates.
For your reference, you should get dialogue where Bianca says "Grim news" that ends in Master saying you have to jump the gap, and then it'll let you across.