Hi,
I have added the code:
At the top of the function "createAssocModule()" in "administrator/components/com_hikashop/classes/menus.php" in order to avoid the creation of these modules. So you should not have this issue anymore.
These associated modules are no more useful since the last release which allow to edit the settings in the Joomla menus / modules options.
I tried to debug your website to know why this was happening, but I encountered a Fatal error due to the allowed memory size which was to low. Could you increase that value ? That way we will be able to do a complete debug.