Fatal error and conflct with WP All Import plugin

I got fatal error with WP All Import Pro and Query Monitor plugin

Fatal error: Uncaught Exception: Serialization of ‘Closure’ is not allowed
in /mydomain.com/public_html/wp-includes/functions.php on line 625

Call stack:

serialize()
wp-includes/functions.php:625
maybe_serialize()
wp-content/plugins/wp-all-import-pro/classes/session.php:83
PMXI_Session::set()
wp-content/plugins/wp-all-import-pro/controllers/admin/import.php:1654
PMXI_Admin_Import::template()
wp-content/plugins/wp-all-import-pro/wp-all-import-pro.php:774
PMXI_Plugin::adminInit()
wp-includes/class-wp-hook.php:324
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:348
WP_Hook::do_action()
wp-includes/plugin.php:517
do_action()
wp-admin/admin.php:175
Query Monitor

Thanks