There is a plugin under the Animation tab called “Anim Distance Matching Plugin.” This plugin contains nothing in it. After looking in to the plugin online, people said it was a stand in for a future feature. That was over a year ago.
If this was added then removed, it would make sense if it was at least marked as obsolete and left in for notifying users on upgrades. However this does not seem to be the case. Please remove this plugin.