I've had Tweetily installed for quite a while now and always loved it as it DOES bring more traffic to my site.
However, it had stopped working following the last update. In checking your support page here, I deactivated it, deleted it, installed it again, did a full reset on the settings bringing them back to the original settings as though I'd only installed it for the first time.
When I attempted to authorize it to my Twitter account, it goes through the authorization, but then in reverting back to my dashboard, I get the following:
Fatal error: Cannot use object of type WP_Error as array in /home/explorat/public_html/wp-content/plugins/tweetily-tweet-wordpress-posts-automatically/Include/top-oauth.php on line 100
Due to this, I'm unable to fully install Tweetily and use it, as I can't get it to link up to my Twitter acount.