NS Cloner stopped working after php 8

Hi, after I have updated to php 8, NS Cloner stopped working and I just saw this error in the log:

[21-Jun-2022 14:14:42 UTC] PHP Fatal error:  Uncaught Error: The script tried to modify a property on an incomplete object. Please ensure that the class definition "ActionScheduler_SimpleSchedule" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide an autoloader to load the class definition in /wp-content/plugins/ns-cloner-site-copier/ns-utils.php:108
Stack trace:
#0 /wp-content/plugins/ns-cloner-site-copier/processes/class-ns-cloner-rows-process.php(133): ns_recursive_search_replace()
#1 /wp-content/plugins/ns-cloner-site-copier/vendor/a5hleyrich/wp-background-processing/classes/wp-background-process.php(301): NS_Cloner_Rows_Process->task()
#2 /wp-content/plugins/ns-cloner-site-copier/abstracts/class-ns-cloner-process.php(234): WP_Background_Process->handle()
#3 /wp-content/plugins/ns-cloner-site-copier/vendor/a5hleyrich/wp-background-processing/classes/wp-background-process.php(175): NS_Cloner_Process->handle()
#4 /wp-includes/class-wp-hook.php(307): WP_Background_Process->maybe_handle()
#5 /wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
#6 /wp-includes/plugin.php(474): WP_Hook->do_action()
#7 /wp-admin/admin-ajax.php(187): do_action()
#8 {main}
  thrown in /wp-content/plugins/ns-cloner-site-copier/ns-utils.php on line 108