TemplateNotFound error when running simple Airflow BashOperator

You should try with space at the end of filepath. whichever operator you are using you should always follow the same rule.

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

in addition to all the answers provided i had to do something more to get rid of the jinja template not found issue.

we have to add space after the file name in task definition.

This is a pitfall of airflow. Add a space at the end of your bash_command and it should run fine

Source: https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=62694614