All NetBox jobs failing with "'NoneType' is not iterable"

[brandsdorfer]

Hello,

All jobs, scripts, and reports in my NetBox instance are failing with TypeError: 'NoneType' object is not iterable. This seems to be a system-wide issue with the netbox-rq workers.

My questions are:

1. How can I set to see full logs of Jobs in Netbox?
2. What could be the root cause of the original 'NoneType' is not iterable error affecting all jobs?

after exacuting script i see that

and on the jobs itself i see that

Any help would be appreciated.

netbox version v4.3.4
python version 3.12.3

[jeremystretch]

FYI your screenshots appear to be broken.

[rodneymandap]

I have the same issue. It happens when I passed an instance in the job. I'm using netbox 4.3.7.

[RezaSbu]

Hi — it looks like the NoneType iteration error usually comes from either missing migrations or a misconfigured background worker.

Here are some steps to try:

1. Confirm database migrations:
   python manage.py migrate
   python manage.py collectstatic --noinput

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Make sure no migration errors appear.

2. Check background worker & Celery config:

• Ensure Celery or worker services are running and connected to Redis/RabbitMQ.
• Restart the worker: systemctl restart netbox-worker (or the service you use).

3. Inspect the failing job logs:

• Find the failing job ID in the web UI or worker logs.
• Look for the first line mentioning your project file/path — this usually indicates the field/model returning None.

4. Common causes:

• Missing related objects (ForeignKey) assumed to exist.
• Signal handlers expecting non-null fields — check recent data imports.

If you paste the traceback here, I can propose exact commands or fixes.
If this helps, please mark this answer as accepted so others can find it quickly. Thanks!