Hello,
First point : Your Joomla error reporting may not be set in order to display this kind of type error.
So, go in System dropdown, and select Global Configuration, then in Server tab, see this screenshot :
Second point : This function is depracted only for your website, from our side that was already corrected, conclusion ?
For a reason or another when you
updated your HikaShop version, the plugin file
wasn't updated, this file is
locked to written, specific configuration from you or from your localhost, I can't say...
In order to correct it, you must updated your
Geolocation plugin in order to correct this.
Hope this will help you.
Regards