Warning and Deprecated Alert deleting products and categories

-- url of the page with the problem -- : www.tradesell.it
-- HikaShop version -- : 5.0.3
-- Joomla version -- : 4.4.3
-- PHP version -- : 8.2.0
-- Browser(s) name and version -- : Chrome 122.0.6261.131
-- Error-message(debug-mod must be tuned on) -- : Deprecated: Creation of dynamic property plgHikashopMassaction_category::$deletedCat is deprecated in /web/htdocs/www.tradesell.it/home/plugins/hikashop/massaction_category/massaction_category.php on line 333
Warning: Attempt to read property "product_type" on null in /web/htdocs/www.tradesell.it/home/plugins/finder/hikashop/hikashop.php on line 244

Warning: Attempt to read property "alias" on null in /web/htdocs/www.tradesell.it/home/plugins/finder/hikashop/hikashop.php on line 249

Hi,
I receive this Warning after deleting products:
Warning: Attempt to read property "product_type" on null in /web/htdocs/www.tradesell.it/home/plugins/finder/hikashop/hikashop.php on line 244

Warning: Attempt to read property "alias" on null in /web/htdocs/www.tradesell.it/home/plugins/finder/hikashop/hikashop.php on line 249

And when deleting categories i read this message:
Deprecated: Creation of dynamic property plgHikashopMassaction_category::$deletedCat is deprecated in /web/htdocs/www.tradesell.it/home/plugins/hikashop/massaction_category/massaction_category.php on line 333

So far it looks like that it all works well, but i wanted to point out this issue.
Thanks
Eiasu