Azure billing import with exports fails with 'NoneType' object has no attribute 'lower'

[valent]

Describe the bug I upgraded to the latest version and tried import of bills using Azure exports options, this fails as below

To Reproduce Steps to reproduce the behavior:

1. Upgrade to version 2025041101-public
2. Import Azure bills with exports options.
3. Check the events tab in dashboard

Expected behavior Resources and bills should be imported without any errors

Additional context Import without the exports option works as expected

[VR-Hystax]

Hello @valent Please provide diworker service logs with error traceback. How to find logs please read in: https://hystax.com/documentation/optscale/private_deployments/kibana_logs.html

[valent]

Hi @VR-Hystax

Attached are the logs

diworker-logs.txt

[nk-hystax]

Hi @valent! Thanks for the report. Could you please provide a screenshot of your Azure export details?

Please note that OptScale requires export with

• Scope: Subscription
• Frequency: Daily export of month-to-date costs.
• Type of data: Cost and usage details (usage only).
• Overwrite data is On.