Errror:
Exception #0 (Exception): Notice: Trying to access array offset on value of type int in /var/www/deploy/staging/releases/53/app/code/MGS/Ajaxlayernavigation/Model/Layer/Filter/DefaultFilter.php on line 121
How to fix it:
Please follow steps:
Step 1: Please download the theme latest version.
Step 2: update the theme, please refer this article to upgrade it: