parse_str(): Passing null to parameter #1 ($string) of type string is deprecated

Using v 1.7.9, all other sw updated & after upgading to PHP 8.1.
I found in debug.log:

[31-Dec-2022 14:30:55 UTC] PHP Deprecated: parse_str(): Passing null to parameter #1 ($string) of type string is deprecated in /…/wp-content/plugins/graphina-elementor-charts-and-graphs/utils/graphina_general_helper.php on line 123

The bypass (possibly a fix) is: parse_str($url_params??””,$params);

Just add ??”” in case $url_params is null from previous line

The page I need help with: [log in to see the link]