Upgrading Essentials to Business broke my store!

-- HikaShop version -- : latest
-- Joomla version -- : 3.3.0
-- PHP version -- : 5.5.11
-- Browser(s) name and version -- : IE 11
-- Error-message(debug-mod must be tuned on) -- : Fatal error: Class 'hikashopDatepickerfield' not found in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 650

When i press the ADD TO CART button for any product, I get this error:

Fatal error: Class 'hikashopDatepickerfield' not found in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 650

Everything was fine until I upgraded my Hikashop Essentials to Business!

I installed sample data when I installed Essentials.

Ok, made the code changes in the fields.php file and enabled the Hika Date Picker plugin. Now I get this on the checkout page:


Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 652

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 652
BILLING ADDRESS

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 1486

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 1486

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 1486

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 1486

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 1486

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 1486

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 1486

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 1486

Notice: Undefined variable: classType in C:\xampp\htdocs\administrator\components\com_hikashop\classes\field.php on line 1486
Plugin singledropdown missing or deactivated Plugin text missing or deactivated Plugin text missing or deactivated
Plugin text missing or deactivated
Plugin text missing or deactivated Plugin text missing or deactivated Plugin zone missing or deactivated
Plugin zone missing or deactivated
Telephone: Plugin text missing or deactivated

The instructions in the thread you linked above said to put the code *before* the line, but the code actually goes *after* said line of code.

It was already deactivated. The problem was the code insertion instructions were backwards. All working now!