Hi
This is more a PHP issue than a WordPress issue, but if multiple plug-ins include or require files that declare the same class with the same name, you’ll get a collision. You only need to define the class once, then you can instantiate it as many times as you need in your multiple systems.
You need to update OAuth.php which can be found here https://github.com/abraham/twitteroauth/tree/master/twitteroauth
or simply change OAuth.php
class OAuthException extends Exception {
// pass
}
to
if (!class_exists(‘OAuthException’)) {
class OAuthException extends Exception {
// pass
}
}