Hi,
The link to the profile, from the control panel of HikaShop is generated by the plugin "HikaShop joomla user account link plugin".
In the settings of the plugin, you have an option "Force menu". In there, you need to enter the id of a menu item of the "Users" component of Joomla. If you leave it empty, the resulting URL will have a URL with a menu item which might not work. Similarly, if you have the id of a menu item which you deleted, or change its type, it will create a problem.
So you have to check this setting and make sure it's set to a valid menu item's id.