The file admin/includes/modules/easypopulate_4_attrib_detailed_ep.php includes several instances where it either in the notes or in the code references using the language_id of 1 as the default language id. Unfortunately, for stores where they have installed another language, removed the first language, and/or have identified a language_id other than 1 as the default, this characteristic is not carried forward. The result is as described below which also contains reference to the fix.
The file admin/includes/modules/easypopulate_4_attrib_detailed_ep.php includes several instances where it either in the notes or in the code references using the language_id of 1 as the default language id. Unfortunately, for stores where they have installed another language, removed the first language, and/or have identified a language_id other than 1 as the default, this characteristic is not carried forward. The result is as described below which also contains reference to the fix.
See: https://github.com/chaddro/EasyPopulate-4.0/issues/34