Wordpress error

I have the latest version of wordpress and when I install the pluggin the following error appear and then the plugin is not working correctly:

The plugin generated 584 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.

Is anything wrong?

icc's picture

Are you using WP Engine? (hosting service)

It sounds like it might be the same issue as here.

If you could try the fix as well, that would be great!