Designer will not open

I keep getting this error when I try to run designer for a particular project
Message Error loading project
Details

IllegalComponentStateException: component must be showing on the screen to determine its location

The Client for this project will open no problem.

Your best bet is to call in to Tech Support and have them help you fix it.

full error is:

java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
at java.awt.Component.getLocationOnScreen_NoTreeLock(Unknown Source)
at java.awt.Component.getLocationOnScreen(Unknown Source)
at com.jidesoft.alert.Alert.internalShowPopup(Unknown Source)
at com.jidesoft.popup.JidePopup.showPopup(Unknown Source)
at com.inductiveautomation.ignition.designer.ConnectionHealthListener.setConnectionOk(ConnectionHealthListener.java:133)
at com.inductiveautomation.ignition.designer.ConnectionHealthListener.propertyChange(ConnectionHealthListener.java:165)
at java.beans.PropertyChangeSupport.fire(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at com.inductiveautomation.ignition.client.gateway_interface.AbstractGatewayConnection.setConnectionUp(AbstractGatewayConnection.java:571)
at com.inductiveautomation.ignition.client.gateway_interface.AbstractGatewayConnection.notifyGatewayException(AbstractGatewayConnection.java:679)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.fireGatewayException(GatewayInterface.java:171)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:314)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.getResponse(GatewayInterface.java:472)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:249)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:240)
at com.inductiveautomation.ignition.designer.gateway.DTGatewayInterface.loadProject(DTGatewayInterface.java:349)
at com.inductiveautomation.ignition.designer.IgnitionDesigner$StartupProjectDialogHandler$1.run(IgnitionDesigner.java:380)
at java.lang.Thread.run(Unknown Source)

Ignition v7.6.6 (b2014040112)
Java: Oracle Corporation 1.8.0_40