[Python] Apache Airflow DAG not running

I have installed the Airflow Docker environment as described in this guide (3.0.2)and I'm able to run a very simple DAG using the EmptyOperator.

However, when I create another DAG using, for example, the BashOperator, I get the following error:

[2025-07-06, 20:51:22] ERROR - DAG not found during start up: dag_id="bash_operator_dag": bundle="BundleInfo(name='dags-folder', version=None)": path="chris_2.py": source="task"

The file i have is a very simple DAG

from airflow import DAG
from airflow.operators.bash import BashOperator

with DAG(
dag_id="bash_operator_dag",
start_date=datetime(2025, 4, 1),
catchup=False,
tags=["test"]
) as dag:
run_bash = BashOperator(
task_id="run_bash",
bash_command="echo chris"
)
process = BashOperator(
task_id="process",
bash_command="echo chris"
)
run_bash >> process


I'm completely lost, why i get this error, help will be appreciatd

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