GWT 2.9.0, GXT 4.1.0, and Java 11 - nest member error

When running unit tests, I receive the following error.

java.lang.IncompatibleClassChangeError: Type com.google.gwt.dom.client.Style$Overflow$1 is not a nest member of com.google.gwt.dom.client.Style: current type is not listed as a nest member

Any insight will be greatly appreciated.

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