Hi, Tina.
Thank you for reaching out and sharing your .story file!
It looks like your variable Results.PassPoints is corrupted, which is why the Results slide doesn't work. You can test this by deleting the textbox that references that variable, and the project should work as expected.
This corruption could be related to a trigger you had on slide 1.7, which used the variable. Deleting the Results slide also doesn't delete Results.PassPoints (even if it deletes the other related built-in variables), so the corruption remains.
What I did was, after deleting the slide, I imported the .story file into a new one and recreated the Results slide.
I'm attaching it here if you'd like to test it.
Let me know if it works!