This thread is resolved. Here is a description of the problem and solution.
Problem:
The client has assigned the credits to the site but it was not showing.
Solution:
Deleting the existing site key and registering WPML with a new key solved the issue.
Relevant Documentation:
https://wpml.org/documentation/automatic-translation/why-credits-may-be-missing-and-how-to-fix-it/#reusing-a-site-key
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