Class Cast Exception Editing REST CP

When attempting to edit a REST CP without parameters, I get the following exception:
STACK 0
java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Map
at org.teiid.designer.datatools.profiles.ws.PropertyPage.initControls(PropertyPage.java:450)
at org.teiid.designer.datatools.profiles.ws.PropertyPage.createCustomContents(PropertyPage.java:255)
at org.eclipse.datatools.connectivity.ui.wizards.ProfileDetailsPropertyPage.createContents(ProfileDetailsPropertyPage.java:74)
at org.teiid.designer.datatools.profiles.ws.PropertyPage.createContents(PropertyPage.java:127)
at org.eclipse.jface.preference.PreferencePage.createControl(PreferencePage.java:232)
at org.eclipse.jface.preference.PreferenceDialog.createPageControl(PreferenceDialog.java:1502)
at org.eclipse.jface.preference.PreferenceDialog$14.run(PreferenceDialog.java:1259)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)