This thread is resolved. Here is a description of the problem and solution.
Problem: If I disable the WPML translation editor as a default, the ACF options stop working.
Solution: It is a known issue in ACF Multilingual 1.2, If we update the plugin to 1.3 and it will work fine.
Relevant Documentation: https://wpml.org/download/acfml/?section=changelog check Version 1.3 : "Reverted the ACF Options Pages handling to the old workflow (with switching language switcher on the Options page)."
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