Content Module issue

After publishing content module I see that line:
Warning: trim() expects parameter 1 to be string, array given in C:\xampp\htdocs\lul\libraries\joomla\registry\format\json.php on line 50



It's fresh instalation. Any hints what to do about it?

my json.php

Hi,
Can you give us more information like what Joomla/Hikahsop version are you using ? Also, It's working fine on my end, and I don't think that your issue is coming from hikashop, but can you download the last Hikashop version through our website, Install it and test it again ?