Trying to access array offset on value of type null

[OndrejoSVK]

Hi, my website https://lusallini.com is showing those errors. It's showing all the time at the top of the website and I'm having trouble fixing it. Could somebody look into it and help me out, please? It just appeared some time ago and I wasn't doing anything with the site for some time.

Warning: Trying to access array offset on value of type null in /www/l/u/u174253/public_html/wp-content/plugins/unyson/framework/helpers/general.php on line 1275

Warning: foreach() argument must be of type array|object, null given in /www/l/u/u174253/public_html/wp-content/plugins/unyson/framework/helpers/general.php on line 1275

Thank you!