Hello,
I'm afraid that your issue is not related to HikaShop directly since the loop is within the Joomla core :
245 Joomla\CMS\Table\Nested->rebuild() JROOT\libraries\src\Table\Nested.php:1340
246 Joomla\CMS\Table\Nested->rebuild() JROOT\libraries\src\Table\Nested.php:1340
247 Joomla\CMS\Table\Nested->rebuild() JROOT\libraries\src\Table\Menu.php:294
248 Joomla\CMS\Table\Menu->store() JROOT\administrator\components\com_menus\models\item.php:1430
I suppose that you will have the same problem if you create a menu different than an HikaShop one.
You should have something wrong in your database for your menus and it generates an infinite loop within the "rebuild" function of the Joomla core.
Regards,