AttributeError: 'module' object has no attribute 'fspath' exception is thrown when running app = flask.Flask(__name__) for flask v1.13.

Version is Python 2.7 and 3.5. I realize fspath is only available for Python version >= 3.6 but there shouldn't be any breaking changes from Flask 1.1.2 => 1.1.3, so the classifiers here are actually incorrect.