Error duplicating a website from dev to live version

[Cristiano Polese]

Hello, i'm tryn to duplicate this website bergamini.cmplab.it from dev version (subdomain), to live site (bergaminivini.it). Using basic theme and creative elements as builder

i see two errors, that i attach on screenshot.

and, on frontend:

Warning
: Trying to access array offset on value of type null in

/home/yo12bvlg/public_html/modules/creativeelements/includes/widgets/language-selector.php

on line 198

Thanks for your help

Cristiano

[Cristiano Polese]

I attach another error, related to the first one,