[Closed] Error message when trying to send a page to Smartling for translation

Background of the issue:
I am trying to send a test translation to Smartling using WPML on my site hidden link. I am following the documentation at https://wpml.org/documentation/translating-your-contents/professional-translation-via-wpml/doing-test-translation/?utm_source=plugin&utm_medium=gui&utm_campaign=wpmltm.

Symptoms:
I continue to get the error messages: 'Rollback jobs...' and 'Batch rolled back' when trying to send a page to Smartling for translation.

Questions:
Why am I receiving the 'Rollback jobs...' and 'Batch rolled back' error messages?
How can I successfully send a test translation to Smartling using WPML?