Attribute error while creating web page with justpy

Question

Hi I was creating a simple plain web page with justpy and I got an attribute error.

This was the code:

import justpy as jp

def app():
    wp = jp.WebPage()  
    return wp

jp.justpy(app)

this was the error:

/usr/local/lib/python3.6/dist-packages/justpy
Module directory: /usr/local/lib/python3.6/dist-packages/justpy, Application directory: /home/nsu/Desktop/datavisual
Traceback (most recent call last):
  File "Web_App_1.py", line 7, in <module>
    jp.justpy(app)
  File "/usr/local/lib/python3.6/dist-packages/justpy/justpy.py", line 383, in justpy
    uvicorn.run(app, host=host, port=port, log_level=UVICORN_LOGGING_LEVEL)
  File "/usr/local/lib/python3.6/dist-packages/uvicorn/main.py", line 461, in run
    server.run()
  File "/usr/local/lib/python3.6/dist-packages/uvicorn/server.py", line 67, in run
    return asyncio.run(self.serve(sockets=sockets))
AttributeError: module 'asyncio' has no attribute 'run'

I tried to replace jp.WebPage() with jp.QuasarPage() but got the same error

pls help.