C:\Users\dolgo\PycharmProjects\pythonVPPStorage\venv\Scripts\python.exe "C:\Program Files\JetBrains\PyCharm Community Edition 2020.2.2\plugins\python-ce\helpers\pydev\pydevd.py" --multiproc --qt-support=auto --client 127.0.0.1 --port 58314 --file C:/Users/dolgo/PycharmProjects/pythonVPPStorage/main.py
Connected to pydev debugger (build 212.4746.96)
Traceback (most recent call last):
  File "C:\Program Files\JetBrains\PyCharm Community Edition 2020.2.2\plugins\python-ce\helpers\pydev\pydevd.py", line 1483, in _exec
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "C:\Program Files\JetBrains\PyCharm Community Edition 2020.2.2\plugins\python-ce\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "C:/Users/dolgo/PycharmProjects/pythonVPPStorage/main.py", line 10, in <module>
    app = Flask(__name__)
  File "C:\Users\dolgo\PycharmProjects\pythonVPPStorage\venv\lib\site-packages\flask\app.py", line 409, in __init__
    instance_path = self.auto_find_instance_path()
  File "C:\Users\dolgo\PycharmProjects\pythonVPPStorage\venv\lib\site-packages\flask\app.py", line 641, in auto_find_instance_path
    prefix, package_path = find_package(self.import_name)
  File "C:\Users\dolgo\PycharmProjects\pythonVPPStorage\venv\lib\site-packages\flask\scaffold.py", line 839, in find_package
    package_path = _find_package_path(root_mod_name)
  File "C:\Users\dolgo\PycharmProjects\pythonVPPStorage\venv\lib\site-packages\flask\scaffold.py", line 790, in _find_package_path
    return os.path.dirname(next(iter(spec.submodule_search_locations)))
TypeError: 'NoneType' object is not iterable

Process finished with exit code 1

from flask import Flask
app = Flask(__name__)
if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, request, send_from_directory

# set the project root directory as the static folder, you can set others.
app = Flask(__name__, static_url_path='')

@app.route('/js/<path:path>')
def send_js(path):
    return send_from_directory('js', path)

if __name__ == "__main__":
    app.run()