PHP Deprecated

Message

unserialize(): Passing null to parameter #1 ($data) of type string is deprecated

Error at

app/functions/fn.products.php, line: 2850

Backtrace

File:app/functions/fn.products.php
Line:2850
Function:{closure}
File:app/controllers/frontend/categories.php
Line:137
Function:fn_get_products_layout
File:app/functions/fn.control.php
Line:722
Function:include
File:app/functions/fn.control.php
Line:458
Function:fn_run_controller
File:index.php
Line:19
Function:fn_dispatch
GENERAL LOAD SWITCHES