I'm having trouble using The Hub to update my growing list of sites. When I use the update all option at most only 1 site will get updated, the rest either come up with a failure message or the spinner just keep spinning until I hit cancel action. When I try to update sites individually, I might get one plugin or theme to update, but the management area will indicate that everything was updated (or it will contradict itself about that) and I have to leave the page to get it to reload with the correct data.
Could there be a conflict with the security plugins I'm using (iThemes, Sucuri, and WordFence)? What else could be causing the problem?