[Risolto] Serbian (Latin) not showing up as an option to use

Background of the issue:
I am trying to translate my default English website to Serbian (Latin) using WPML on my site link nascosto.

Symptoms:
When I add Serbian as a language, Cyrillic is applied by default and there is no option to select or change it to Latin. The language mapping option is missing in both the 'Language Settings' and the 'Automatic Translation Settings'.

Questions:
Why is Serbian (Latin) not showing up as an option to use in WPML?
How can I enable Serbian (Latin) instead of Cyrillic for my website using WPML?