Undefined array key 1

[cimt]

PHP 8.0.16
Clean EVO 3.1.9 install

Error : Undefined array key 1

Error information
ErrorType[num] WARNING[2]
File D:\laragon\www\evo3\assets\plugins\pagebuilder\pagebuilder.php
Line 744
Source list($val, $key) = is_array($element) ? $element : explode('==', $element);