While using RuleBender on a Mac (this issue has also been found on a Windows Machine), I get the following error when creating a new project from the template.bngl and blank_file.bngl:

Specific steps to recreate the error:
File -> "New BioNetGen Project"
Create project window pops up and then from the "Select a Sample" drop down menu I choose either "template.bngl" or "blank_file.bngl". Then hit OK.
Error then occurs.