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File org-netbeans-modules-java-hints/rules/errors/org-netbeans-modules-javahints-UncaughtException.instance threw java.lang.ClassNotFoundException: org.netbeans.modules.javahints.UncaughtException File org-netbeans-modules-java-hints/rules/hints/experimental/org-netbeans-modules-javahints-UnusedDeclaration.instance threw java.lang.ClassNotFoundException: org.netbeans.modules.javahints.UnusedDeclaration
I have just fixed this.