gargrishabh75 commented on issue #18286:
URL: https://github.com/apache/airflow/issues/18286#issuecomment-920981829
> CAn you please take a look at webserver logs and paste the error you see
there? I think that must be something specific to your setting (I have some
guesses but they are pretty wild without logs).
```Python version: 3.7.11
Airflow version: 2.1.3
-------------------------------------------------------------------------------
Traceback (most recent call last):
File
"/home/airflow/.local/lib/python3.7/site-packages/flask/app.py", line
2447, in wsgi_app
response = self.full_dispatch_request()
File
"/home/airflow/.local/lib/python3.7/site-packages/flask/app.py", line
1952, in full_dispatch_request
rv = self.handle_user_exception(e)
File
"/home/airflow/.local/lib/python3.7/site-packages/flask/app.py", line
1821, in handle_user_exception
reraise(exc_type, exc_value, tb)
File
"/home/airflow/.local/lib/python3.7/site-packages/flask/_compat.py",
line 39, in reraise
raise value
File
"/home/airflow/.local/lib/python3.7/site-packages/flask/app.py", line
1950, in full_dispatch_request
rv = self.dispatch_request()
File
"/home/airflow/.local/lib/python3.7/site-packages/flask/app.py", line
1936, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File
"/home/airflow/.local/lib/python3.7/site-packages/airflow/www/auth.py",
line 34, in decorated
return func(*args, **kwargs)
File
"/home/airflow/.local/lib/python3.7/site-packages/airflow/utils/session.py",
line 70, in wrapper
return func(*args, session=session, **kwargs)
File
"/home/airflow/.local/lib/python3.7/site-packages/airflow/www/views.py",
line 858, in last_dagruns
for r in query
File
"/home/airflow/.local/lib/python3.7/site-packages/airflow/www/views.py",
line 858, in <dictcomp>
for r in query
AttributeError: 'NoneType' object has no attribute
'isoformat'
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