Hi Victor,
We had updated the language file for you. Now your site is working perfectly.
You have overrided Sellacious language file in root languages folder(users do so to change language keywords as per their need), by doing that you have to update it everytime whenever we releases a new version. So that your language file is also updated with our new keywords constants.
If your issue is solved please mark this post as resolved.
Thank you
-Team Sellacious