error 404 after integration with ReCaptcha

-- HikaShop version -- : 3.3.1

hi
i was enabled HikaShop ReCaptcha v2 plugin, whit correct settings and the main joomla captcha plugin was disabled.
when i click on registration form, i have a 404 error with message: "0 - Call to undefined function hikashop_isClient()"

how can i fix this?

Hi,

Please update your HikaShop and it will work fine.

is there any other way to solve this problem? because my licence just expired for update

Hi,

Download the install package of the ReCaptcha plugin on our website again and install it again. It will add a patch to allow it to work with old versions of HikaShop.