The maven build fails with following message:
[ERROR] Error: Could not find or load main class Documents\errai-tutorial-master\target.wildfly-10.0.0.Final [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 24.912 s [INFO] Finished at: 2017-07-03T17:52:19+02:00 [INFO] Final Memory: 53M/386M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.codehaus.mojo:gwt-maven-plugin:2.8.0:run (default-cli) on project errai-tutorial: Command [[ [ERROR] cmd.exe /X /C ""C:\Program Files\Java\jdk1.8.0_121\jre\bin\java" -Xmx2048m -XX:CompileThreshold=7000 -Derrai.jboss.home=C:\Projects\CLT Documents\errai-tutorial-master\target/wildfly-10.0.0.Final -Derrai.dev.context=errai-tutorial com.google.gwt.dev.DevMode -gen "C:\Projects\CLT Documents\errai-tutorial-master\target\.generated" -war "C:\Projects\CLT Documents\errai-tutorial-master\src\main\webapp" -logLevel INFO -port 8888 -codeServerPort 9997 -startupUrl errai-tutorial/ -sourceLevel auto -server org.jboss.errai.cdi.server.gwt.EmbeddedWildFlyLauncher org.jboss.errai.demo.App" [ERROR] ]] failed with status 1 [ERROR] -> [Help 1]

The error occurs because there is a space in the path "C:\Projects\CLT Documents\errai-tutorial-master\target/wildfly-10.0.0.Final" resulting in -Derrai.jboss.home to be "C:\Projects\CLT"

To resolve this issue, I had to add quotation marks around ${errai.jboss.home} in the pom.xml:
-Xmx2048m -XX:CompileThreshold=7000 -Derrai.jboss.home="${errai.jboss.home}" -Derrai.dev.context="${errai.dev.context}"