My webpage (frontend) is in Lithuanian language (lt_LT), but backend (dashbuard) is in English. In plugin configuration page i see next error: "Warning: Undefined array key "lt_LT" in /oc-content/plugins/attributes/model/ModelATR.php on line 484". And when I add a new attribute, and then and editing, i see next error: "Warning: Undefined array key 11 in /oc-content/plugins/attributes/model/ModelATR.php on line 169".
How to fix this errors?