Airflow AttributeError: ‘NoneType’ object has no attribute ‘create_dagrun

If you are getting the below error while running a DAG in Airflow:

AttributeError: 'NoneType' object has no attribute 'create_dagrun'

Possible reasons:

1. File system is not available (GCS/s3/linux file system). Try to see if the Python file exists.
2. If there is a syntax error in Python file, Airflow may treat it as non existent.

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