i got this Error When Activating Social Button Warning:

Hi i got this Error When Activating Social Button

Warning: Illegal string offset 'code' in /home/rfnet/public_html/wp-content/plugins/slide-in/lib/class_wdsi_admin_pages.php on line 184

Warning: Illegal string offset 'code' in /home/rfnet/public_html/wp-content/plugins/slide-in/lib/class_wdsi_admin_pages.php on line 184

Warning: Cannot modify header information - headers already sent by (output started at /home/rfnet/public_html/wp-content/plugins/slide-in/lib/class_wdsi_admin_pages.php:184) in /home/rfnet/public_html/wp-includes/pluggable.php on line 899

Im just wondering why all Social Media Buttons in all Plugins Behave this way? Can anyone help me with this one....

Please give me a Step by Step Procedure to Clear this Issue