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Traceback (most recent call last):
  File "/home/vyral/vyral-env/lib/python3.8/site-packages/flask/app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/vyral/vyral-env/lib/python3.8/site-packages/flask/app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/vyral/vyral-env/lib/python3.8/site-packages/flask/app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/vyral/vyral-env/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/home/vyral/vyral-env/lib/python3.8/site-packages/flask/app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/vyral/vyral-env/lib/python3.8/site-packages/flask/app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/vyral/mysite/vyral-flask/twee.py", line 170, in get_img
    ima = generate_tweet(tweet, tweet_author_name, tweet_author_id, tweet_author_dp, tweet_body, tweet_time)
  File "/home/vyral/mysite/vyral-flask/twee.py", line 146, in generate_tweet
    ima = imgkit.from_string(tweet, False, options = options, config=config)
  File "/home/vyral/vyral-env/lib/python3.8/site-packages/imgkit/api.py", line 90, in from_string
    return rtn.to_img(output_path)
  File "/home/vyral/vyral-env/lib/python3.8/site-packages/imgkit/imgkit.py", line 246, in to_img
    raise IOError("wkhtmltoimage exited with non-zero code {0}. error:\n{1}\n\n{2}".format(exit_code, stderr, xvfb_error))
OSError: wkhtmltoimage exited with non-zero code -6. error:
QXcbConnection: Could not connect to display 
**NO MATCH**
**NO MATCH**
You need to install xvfb(sudo apt-get install xvfb, yum install xorg-x11-server-Xvfb, etc), then add option: {"xvfb": ""}.