NoSuchMethodError: com.google.gwt.util.tools.shared.Md5Utils.getMd5Digest

When trying to run or compile this GWT error is thrown:

NoSuchMethodError: com.google.gwt.util.tools.shared.Md5Utils.getMd5Digest

Here is the properties file for our GWT app:

<properties>
<errai.version>4.0.0.Beta2</errai.version>
<gwt.version>2.8.0-beta1</gwt.version>
<slf4j.version>1.5.11</slf4j.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<javaee.version>1.0.2.Final</javaee.version>
<errai.dev.context>${project.artifactId}</errai.dev.context>
<as.version>8.1.0.Final</as.version>

<errai.jboss.home>${project.build.directory}/wildfly-${as.version}</errai.jboss.home>
</properties>

What could be wrong that prevents the app from running with 'mvn gwt:run
-Pjboss7'?


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