[Resolved] Request Language Mapping Not Solved

Background of the issue:
I am trying to map languages on my site hidden link using WPML. I have been following some documentation that includes language codes like so_code":"si-lk"},{"value":"sm-ws","iso_code":"sm-ws"},{"value":"sn-zw","iso_code":"sn-zw"},{"value":"snd-pk","iso_code":"snd-pk"},{"value":"so-so","iso_code":"so-so"},{"value":"sr-cyrl-rs","iso_code":"sr-cyrl-rs"},{"value":"srn-sr","iso_code":"srn-sr"},{"value":"st-ls","iso_code":"st-ls"},{"value":"svc-vc","iso_code":"svc-vc"},{"value":"sw-ke","iso_code":"sw-ke"},{"value":"syc-tr","iso_code":"syc-tr"},{"value":"ta-in","iso_code":"ta-in"},{"value":"te-in","iso_code":"te-in"},{"value":"tet-tl","iso_code":"tet-tl"},{"value":"tg-tj","iso_code":"tg-tj"},{"value":"ti-et","iso_code":"ti-et"},{"value":"tk-tm","iso_code":"tk-tm"},{"value":"tkl-tk","iso_code":"tkl-tk"},{"value":"tl-ph","iso_code":"tl-ph"},{"value":"tlh-qo","iso_code":"tlh-qo"},{"value":"tmh-dz","iso_code":"tmh-dz"},{"value":"tn-bw","iso_code":"tn-bw"},{"value":"tn-za","iso_code":"tn-za"},{"value":"to-to","iso_code":"to-to"},{"value":"tpi-pg","iso_code":"tpi-pg"},{"value":"ts-za","iso_code":"ts-za"},{"value":"tt-ru","iso_code":"tt-ru"},{"value":"tvl-tv","iso_code":"tvl-tv"},{"value":"ty-pf","iso_code":"ty-pf"},{"value":"uig-cn","iso_code":"uig-cn"},{"value":"vic-us","iso_code":"vic-us"},{"value":"wls-wf","iso_code":"wls-wf"},{"value":"wo-sn","iso_code":"wo-sn"},{"value":"xh-za","iso_code":"xh-za"},{"value":"yi-yd","iso_code":"yi-yd"},{"value":"yo-ng","iso_code":"yo-ng"},{"value":"zdj-km","iso_code":"zdj-km"},{"value":"zh-mo","iso_code":"zh-mo"},{"value":"zu-za","iso_code":"zu-za"}]

Symptoms:
I am receiving an error message stating 'This service does not support the following iso-codes: le' when trying to map languages using WPML.

Questions:
Why is the iso-code 'le' not supported by the service?
How can I successfully map languages without encountering this error?