There has to be an entry there. Try opening the scenario again, then the error for sapien will be on the bottom of debug.txt. And also, not giving a specific error does not help in any way.
Edit: Ok, the error you are getting is probably: "you tried to open a non-scenario tag, Bad!". This means that you are not even opening the right tag, you need to be opening the file with the extension ".scenario".
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