Traceback (most recent call last):


 "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2447, in wsgi_app

response = self.full_dispatch_request()


 "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1952, in full_dispatch_request

rv = self.handle_user_exception(e)


 "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1821, in handle_user_exception

reraise(exc_type, exc_value, tb)


 "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise

raise value


 "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1950, in full_dispatch_request

rv = self.dispatch_request()


 "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1936, in dispatch_request

return self.view_functions[rule.endpoint](**req.view_args)


 "/usr/local/lib/python3.7/site-packages/airflow/www/auth.py", line 34, in decorated

return func(*args, **kwargs)


 "/usr/local/lib/python3.7/site-packages/airflow/www/views.py", line 600, in index

tags_filter=arg_tags_filter,


 "/usr/local/lib/python3.7/site-packages/airflow/www/views.py", line 400, in render_template

**kwargs,


 "/usr/local/lib/python3.7/site-packages/flask_appbuilder/baseviews.py", line 281, in render_template

template, **dict(list(kwargs.items()) + list(self.extra_args.items()))


 "/usr/local/lib/python3.7/site-packages/flask/templating.py", line 140, in render_template

ctx.app,


 "/usr/local/lib/python3.7/site-packages/flask/templating.py", line 120, in _render

rv = template.render(context)


 "/usr/local/lib/python3.7/site-packages/jinja2/environment.py", line 1090, in render

self.environment.handle_exception()


 "/usr/local/lib/python3.7/site-packages/jinja2/environment.py", line 832, in handle_exception

reraise(*rewrite_traceback_stack(source=source))


 "/usr/local/lib/python3.7/site-packages/jinja2/_compat.py", line 28, in reraise

raise value.with_traceback(tb)


 "/usr/local/lib/python3.7/site-packages/airflow/www/templates/airflow/dags.html", line 21, in top-level template code

{% from 'appbuilder/loading_dots.html' import loading_dots %}


 "/usr/local/lib/python3.7/site-packages/airflow/www/templates/airflow/main.html", line 20, in top-level template code

{% extends 'appbuilder/baselayout.html' %}


 "/usr/local/lib/python3.7/site-packages/flask_appbuilder/templates/appbuilder/baselayout.html", line 2, in top-level template code

{% import 'appbuilder/baselib.html' as baselib %}


 "/usr/local/lib/python3.7/site-packages/flask_appbuilder/templates/appbuilder/init.html", line 46, in top-level template code

{% block body %}


 "/usr/local/lib/python3.7/site-packages/flask_appbuilder/templates/appbuilder/baselayout.html", line 16, in block "body"

{% block messages %}


 "/usr/local/lib/python3.7/site-packages/airflow/www/templates/airflow/main.html", line 54, in block "messages"

>{{ macros.datetime_diff_for_humans(scheduler_job.latest_heartbeat) }}</time>.


 "/usr/local/lib/python3.7/site-packages/airflow/macros/__init__.py", line 83, in datetime_diff_for_humans

return pendulum.instance(dt).diff_for_humans(since)


 "/usr/local/lib/python3.7/site-packages/pendulum/datetime.py", line 824, in diff_for_humans

other = self.now()


 "/usr/local/lib/python3.7/site-packages/pendulum/datetime.py", line 106, in now

return pendulum.now(tz)


 "/usr/local/lib/python3.7/site-packages/pendulum/__init__.py", line 211, in now

dt = _datetime.datetime.now(local_timezone())


 "/usr/local/lib/python3.7/site-packages/pendulum/tz/__init__.py", line 60, in local_timezone

return get_local_timezone()


 "/usr/local/lib/python3.7/site-packages/pendulum/tz/local_timezone.py", line 35, in get_local_timezone

tz = _get_system_timezone()


 "/usr/local/lib/python3.7/site-packages/pendulum/tz/local_timezone.py", line 63, in _get_system_timezone

return _get_unix_timezone()


 "/usr/local/lib/python3.7/site-packages/pendulum/tz/local_timezone.py", line 178, in _get_unix_timezone

return Timezone(etctz.replace(" ", "_"))


 "/usr/local/lib/python3.7/site-packages/pendulum/tz/timezone.py", line 40, in __init__

tz = read(name, extend=extended)


 "/usr/local/lib/python3.7/site-packages/pendulum/tz/zoneinfo/__init__.py", line 9, in read

return Reader(extend=extend).read_for(name)


 "/usr/local/lib/python3.7/site-packages/pendulum/tz/zoneinfo/reader.py", line 50, in read_for

file_path = pytzdata.tz_path(timezone)


 "/usr/local/lib/python3.7/site-packages/pytzdata/__init__.py", line 63, in tz_path

raise ValueError('Invalid timezone')
ValueError: Invalid timezone

ERROR: Signature extraction failed: Traceback (most recent call last):


 "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature

video_id, player_url, s


 "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 797, in _extract_signature_function

raise ExtractorError('Cannot identify player %r' % player_url)
ExtractorError: Cannot identify player u'/yts/jsbin/player-vflUPJQPD/en_US/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see
https://yt-dl.org/update
on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
