I’m getting following error after installation on (findreads.com):

Warning!You see this message because Shoppica 2 is not properly installed/configured. This happens usually due one (or more) of the following reasons:

1. You have not installed the Shoppica 2 module. Please, go to admin panel, enter Extensions -> Modules, find ‘Shoppica 2 CP’ and click ‘install’. ====> Installed
2. You have not properly updated your index.php file. It should contain these two lines (near the end):

// TB
$controller->dispatch(new Action(‘common/tb’, array(‘front’ => $controller)), new Action(‘error/not_found’)); ====> I have manually inserted this line in /index.php
3. You have not replaced the opencart core files (system/engine/controller.php andcatalog/model/setting/extension.php) with these provided with the Shoppica package.  ====> Replaced this file …

Please help.