Viewing Profile Error after upgrade to Beta 5

I upgraded from 1.04 this afternoon to 1.1 b5 and everything went smooth during the upgrade process. The forum is mostly working, but member profiles are not displaying. The pop-up cards appear OK, but whenever anything tries to display the entire profile, an error is generated:

Fatal error: Call to undefined method XenForo_Model_User::getIdentities() in /home/snowman/public_html/community/library/VKtwitter/Listener/Template.php on line 13

What should I do to fix this? Thanks!
I found the problem. It is an add on called Twitter in Profile v1.01 -- it apparently breaks the profile display in 1.1 b5. When I disabled this add-on, the error went away and profiles displayed properly.