Cannot coerce value '-1' into type: interface java.awt.Paint

I’m getting this message every time I open a window in the designer, and can’t seem to figure out what the source of the problem is. The error details are below. Can anyone point me in the right direction?

java.lang.ClassCastException: Cannot coerce value ‘-1’ into type: interface java.awt.Paint
at com.inductiveautomation.ignition.common.TypeUtilities.coerce(TypeUtilities.java:1195)
at com.inductiveautomation.factorypmi.application.binding.AbstractPropertyAdapter.setQValue(AbstractPropertyAdapter.java:224)
at com.inductiveautomation.factorypmi.application.binding.SimpleBoundTagAdapter.setQValue(SimpleBoundTagAdapter.java:245)
at com.inductiveautomation.factorypmi.application.binding.AbstractPropertyAdapter.updateValue(AbstractPropertyAdapter.java:264)
at com.inductiveautomation.factorypmi.application.binding.SimpleBoundTagAdapter.notifyTagChanged(SimpleBoundTagAdapter.java:498)
at com.inductiveautomation.factorypmi.application.binding.SimpleBoundTagAdapter.tagChanged(SimpleBoundTagAdapter.java:487)
at com.inductiveautomation.ignition.client.sqltags.impl.db.DatasourceTagManager$TagChangeListenerProxy.tagChanged(DatasourceTagManager.java:1078)
at com.inductiveautomation.ignition.client.sqltags.impl.db.DatasourceTagManager.subscribe(DatasourceTagManager.java:294)
at com.inductiveautomation.ignition.client.sqltags.impl.ClientTagManagerImpl.subscribe(ClientTagManagerImpl.java:420)
at com.inductiveautomation.factorypmi.application.binding.SimpleBoundTagAdapter.startup(SimpleBoundTagAdapter.java:140)
at com.inductiveautomation.factorypmi.application.binding.DefaultInteractionController.startupAdapters(DefaultInteractionController.java:313)
at com.inductiveautomation.factorypmi.application.FPMIWindow.startup(FPMIWindow.java:342)
at com.inductiveautomation.factorypmi.designer.workspace.WindowWorkspace$DesigntimeWindowOpener.openWindow(WindowWorkspace.java:3477)
at com.inductiveautomation.factorypmi.designer.workspace.WindowWorkspace.openWindow(WindowWorkspace.java:1284)
at com.inductiveautomation.factorypmi.designer.workspace.StartupPanel$ResourceThumbnail.onClick(StartupPanel.java:335)
at com.inductiveautomation.factorypmi.designer.workspace.StartupPanel$ThumbnailButton$1.mouseClicked(StartupPanel.java:242)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Ignition v7.7.4 (b2015033012)
Java: Oracle Corporation 1.8.0_31