Error on update to 6.5

Hi,

This is a bug in the PayZen component (com_payzen), not in HikaShop. The HikaShop update is only what brings it to the surface.

The fatal error comes from this file on your site:
administrator/components/com_payzen/script.install.php

Around line 38 it has the old Joomla 1.5 installer function with a reversed test:

This declares com_install() only when a function of that name already exists, which is exactly the case where it must not declare it again. HikaShop's installer defines its own com_install() (correctly guarded with !function_exists), so during the update both files are loaded in the same request, PayZen's reversed test passes, and PHP stops with "Cannot redeclare com_install()".

The fix is to add the missing ! so the function is declared only when it does not already exist:

Edit that single line, then run the HikaShop update again and it will complete normally. It is also worth reporting this to the PayZen / Lyra team so they correct it in their component, or updating com_payzen if a newer version is available.
I'll send them a message about it. I would recommend you do the same.

We'll also look at changing the code of HikaShop on our end for the next version so that this cannot happen even with this faulty code in place.