Translation Function missing text-domain [closed]

From WordPress Codex (Link):

<?php $translated_text = esc_attr_x( $text, $context, $domain ) ?>

The $domain is optional. That´s the reason it´s a warning. Do you have debug set to true? If you want to fix it you have to add the text-domain.

esc_attr_x( 'Search for:', 'label', 'TEXT-DOMAIN-FROM-THEME' )

You can find the text-domain in other translatable strings like this one.

General: It´s better to contact the theme-developer in this case. You paid money – you can expect that it does not have any errors or warnings.