This thread is resolved. Here is a description of the problem and solution.
Problem: He had a page builder block not enabled for translation in his page.
Solution: The block shortcode name had a typo issue at WordPress Dashboard > WPML > Settings > Custom XML Configuration. This is why the translation editor wasn't targeting the page builder shortcode properly. I suggested a fix for the typo and also a direct translation in the page using the default WordPress page editor instead the WPML Translation Editor.
Relevant Documentation: https://wpml.org/documentation/support/language-configuration-files/
This is the technical support forum for WPML - the multilingual WordPress plugin.