This thread is resolved. Here is a description of the problem and solution.
Problem: I want to add translation for a theme section "vega-wp-front-page-open1" but I cant translate it.
Solution: I have logged in to your site and enabled ‘Section Content’ field translation by selecting ‘vega_wp_frontpage_open1_content’ checkbox from WPML >> String Translations >> (at the bottom of page) “Translate texts in admin screens” >> theme_mods_vega and hit apply button.
And added 1567 as translation from WPML >> String translation as you can see in the attached screenshots: https://wpml.org/forums/topic/theme-translation-frontpage/#post-4010115
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