Plugin breaks WP 6.8.2

Hi, after installing the plugin it breaks WordPress with this error:

NOTICE: PHP message: PHP Fatal error:  Uncaught Error: Call to undefined function ahcpro_get_current_timezone_offset() in /var/www/websites/mahwebsite/public_html/wp-content/plugins/visitors-traffic-real-time-statistics/WPHitsCounter.php:715
Stack trace:
#0 /var/www/websites/mahwebsite/public_html/wp-content/plugins/visitors-traffic-real-time-statistics/WPHitsCounter.php(171): WPHitsCounter->updateSearchingVisits()
#1 /var/www/websites/mahwebsite/public_html/wp-content/plugins/visitors-traffic-real-time-statistics/functions.php(3301): WPHitsCounter->traceVisitorHit()
#2 /var/www/websites/mahwebsite/public_html/wp-includes/class-wp-hook.php(324): ahcfree_track_visitor()
#3 /var/www/websites/mahwebsite/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#4 /var/www/websites/mahwebsite/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()
#5 /var/www/websites/mahwebsite/public_html/wp-admin/admin-ajax.php(207): do_action()
#6 {main}
  thrown in /var/www/websites/mahwebsite/public_html/wp-content/plugins/visitors-traffic-real-time-statistics/WPHitsCounter.php on line 715

I’ve tried changing that line from ahcpro to ahcfree but it… hangs. No error thrown.

Any help will be appreciated!