The plugin generated 1616 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin. The most common causes are: 1. A white space before or after the PHP opening or closing tags 2. A file encoded in UTF-8 3. Another issue when something is called at the wrong time, or a call that cannot be resolved without intervention 4. Using the WordPress add_option function.