I'm trying to write our first Airflow DAG, and I'm getting the following error when I try to list the tasks using command airflow list_tasks orderwarehouse:

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/airflow/models.py", line 2038, in resolve_template_files
    setattr(self, attr, env.loader.get_source(env, content)[0])
  File "/usr/local/lib/python2.7/site-packages/jinja2/loaders.py", line 187, in get_source
    raise TemplateNotFound(template)
TemplateNotFound: ./home/deploy/airflow-server/task_scripts/orderwarehouse/load_warehouse_tables.sh

This DAG is not supposed to use a template. I'm only trying to run the shell script in the specified location per the instructions in the docs. The shell script does exist in that location and is spelled correctly. My DAG looks like this:

from airflow import DAG
from airflow.operators.bash_operator import BashOperator

default_args = {
    'owner': 'airflow',
    'depends_on_past': False,
    'start_date': datetime(2015, 6, 1),
    'email': ['airflow@airflow.com'],
    'email_on_failure': False,
    'email_on_retry': False,
    'retries': 1,
    'retry_delay': timedelta(minutes=5),
    # 'queue': 'bash_queue',
    # 'pool': 'backfill',
    # 'priority_weight': 10,
    # 'end_date': datetime(2016, 1, 1),
}

orderwarehouse = DAG('orderwarehouse', default_args=default_args)

load_mysql = BashOperator(
    task_id='load_warehouse_mysql',
    bash_command='./home/deploy/airflow-server/task_scripts/orderwarehouse/load_warehouse_tables.sh',
    dag=orderwarehouse)

Not sure why it thinks it needs to look for a Jinja template. Running out of ideas on this one, would appreciate if anyone can point me to where I'm going astray. Thanks.