Why I Am Getting Error 'Failed to save settings. Returned status: 400' After Upgrading To Ansible Tower 3.7.x ?

Solution Verified - Updated -

Issue

After upgrading to Ansible Tower 3.7.x, I'm getting the following error when I try to save any settings from the UI or API.

Failed to save settings. Returned status: 400

In the /var/log/tower/tower.log of the Ansible Tower nodes, I only see the following error.

2020-07-23 03:01:32,751 WARNING  awx.api.generics status 400 received by user admin attempting to access /api/v2/settings/all/ from 192.168.33.1
2020-07-23 03:01:32,753 WARNING  django.request Bad Request: /api/v2/settings/all/

Environment

Ansible Tower 3.7+

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