I think there are two possible ways to fix that. 1. Make the name a required parameter. 2. Provide a default value. I choosed option 1 in this fix to be consistent with other .new functions. Also I think `RNA_def_string` instead of `RNA_def_string_file_path` should be used here. Looks like a copy-paste error. Reviewers: brecht Differential Revision: https://developer.blender.org/D3728