Usually when this error is given I find it has to do with NAT type. Check your NAT type in your console internet settings. The options are Open, Moderate, and Strict. You want it to say Open, and if it doesn't you can follow a tutorial on YouTube to correct this. Of course, your geographic region may also be causing issues. The game will try to match you with people closer to your location so your ping isn't extremely high. If there aren't many players around you, it may be more difficult to find a viable match.