Preview issue with 1 course

This morning I opened up my course and am now getting an error report each time I try to preview.  I made a couple of changes to the course this morning including a state change trigger and changing the state of a button.  After the preview error came up I reverted all changes but I am still getting an error.  I attempted previewing another course and it worked fine.  Just seems to be with the one course.  I have attached the course I am working on.  Any thoughts?

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