Before you install Wowonder Script, you need to do this step first.
1. Open the function_genenral.php at "assets/includes" folder and search for the keyword "Purchase" and
find this code from function check_($check) and function check_success($check) line 763 to 786
Look for this 1 line of code
$check = json_decode($file, true);
and replace it to
$check = array('status' => 'SUCCESS', 'url' => $siteurl, 'code' => $check);
and install it with any purchase code.
If you want to activate the Messengers & Native Apps find the Request.php file on the Directory
and just follow the Steps above. but you need to find manually the codes to change it.