Shooting in the dark here, but best guess is that your upgraded instance isn't really fully upgraded. Check your vendor/dreamfactory/df-sqldb and vendor/dreamfactory/df-core directories. The changelog files should match for both your 2.0.4 image, and the instance upgraded from 2.0.3 to 2.0.4. If they don't match then your instance didn't successfully complete the upgrade. You'll need to rerun the composer install and subsequent steps of the upgrade process, ensuring that you troubleshoot any errors that pop up.
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