I get this notice under each tweet in the queue list.
Warning count(): Parameter must be an array or an object that implements Countable in /homepages/17/d293667908/htdocs/tripreporter/wp-content/plugins/tweet-wheel-pro/includes/classes/class-twp-tweet.php on line 474
Thanks for the feedback. I had a look at wp-config.php and it is set to Debug off. This is the only plug in that shows this type of info so I am pretty sure it is just the plug in and not a general debug.