fmz_extend_api_demo build problem please

I tried the official fmz_extend_api_demo today and found an error when I last ran python app.py, as follows: I'm going to try to do this in my own language.init.py:794: FSADeprecationWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True or False to suppress this warning. 'SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and ’ Traceback (most recent call last): File “app.py”, line 152, in <module> db.create_all() File “/usr/lib/python2.7/site-packages/flask_sqlalchemy/init.py”, line 963, in create_all self._execute_for_all_tables(app, bind, ‘create_all’) File “/usr/lib/python2.7/site-packages/flask_sqlalchemy/init.py”, line 955, in _execute_for_all_tables op(bind=self.get_engine(app, bind), **extra) File “/usr/lib/python2.7/site-packages/flask_sqlalchemy/init.py”, line 896, in get_engine return connector.get_engine() File “/usr/lib/python2.7/site-packages/flask_sqlalchemy/init.py”, line 556, in get_engine self._sa.apply_driver_hacks(self._app, info, options) File “/usr/lib/python2.7/site-packages/flask_sqlalchemy/init.py, line 861, in apply_driver_hacks If you are using the OS.path.join app.root_path, info.database AttributeError: cant set attribute Please point us in the direction of trouble, thank you!