Why Am I Getting An Error "ERROR: subscriptions_username is required" After Upgrading Ansible Tower 3.8.0 When Fetching Licenses?

Solution Verified - Updated -

Issue

After upgrading Ansible Tower 3.8.0 and trying to fetch licenses at the first access to the web UI, the error returns with "ERROR: subscriptions_username is required".

And also, trying to upload a manifest file which is downloaded from the Customer Portal, the error "Invalid file format. Please upload valid JSON." occurred.

Environment

Ansible Tower 3.8.0 (upgrade)

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