Hello,
That error means that you have some plugin which uses the same OAuth library, and that other plugin is conflicting. I’ve found that plugin – tweets – I’ve renamed its folder via FTP to tweets_old in the wp-content/plugins directory.
But there occurred another error:
Server error!
The server encountered an internal error and was unable to complete your request.
Concerning this issue you have to contact your hosting provider as 500 error is the server error, not the theme.
Thank you.
Regards,
Eva Kemp.