WP_DEBUG is true on my test server.
When I use the shortcode in a widget, this warning appears above the widget on my site:
Notice: Object of class AWeberEntry could not be converted to int in /var/www/jobmob.co.il/html/wp-content/plugins/aweber-dev-facile/functions/api-AW-devfacile.php on line 85
But the shortcode works- the subscriber count is correctly displayed.
]]>