i'm studing AirFlow, Kafka, Spark and Docker.   I'm trying to run this project here https://github.com/KumarRoshandot/AirFlow_Kafka_Spark_Docker/tree/master/Project_Flight_Docker2   But my task is always returning an error:  Error: Cannot load main class from JAR org.apache.spark:spark-sql-kafka-0-10_2.11:2.3.1 with URI org.apache.spark. Please specify a class through --class. This is my docker compose And here is my airflow docker.   What am i doig wrong?  ... View more