Incompatibility Query monitor with WP all import

Hello,

Importing via WP all import when you have query monitor plugin active (https://projectdmc.org/plugins/query-monitor/), results in this error:

Fatal error: Uncaught Exception: Serialization of 'Closure' is not allowed
in /home/weblikepro/dental.weblikepro.ro/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

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