TigerVNC Too many security failures

TigerVNC Viewer 64-bit v1.6.0
Built on: 2016-01-04 15:10
Copyright (C) 1999-2015 TigerVNC Team and many others (see README.txt)
See http://www.tigervnc.org for information on TigerVNC.
 
Wed Feb  3 14:10:38 2016
 CConn:       connected to host vnc.server port 5902
 
Wed Feb  3 14:10:39 2016
 CConnection: Server supports RFB protocol version 3.3
 CConnection: Using RFB protocol version 3.3
 CConn:       Too many security failures

pkill vnc
vncserver