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Fatal error when activating plugin

Error

Fatal error: Cannot redeclare class OAuthException in /home/sites/cmbl.co.uk/public_html/wp-content/plugins/adonepage/inc/shortcodes/functions/twitteroauth.php on line 15
 
Solution:
 
there is a coflict with other plugin or theme that used my same library.
 
The fix is very simple.
 
Open shortcodes-functions.php (folder inc/shortcodes) and find e delete this
require('twitteroauth.php');