Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: java.lang.ClassNotFoundException: org.jboss.errai.bus.server.servlet.DefaultBlockingServlet from [Module "deployment.workbench.war" from Service Module Loader]

Caused by: java.lang.ClassNotFoundException: org.jboss.errai.bus.server.servlet.DefaultBlockingServlet from [Module "deployment.workbench.war" from Service Module Loader]

07:30:33,663 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 1) WFLYCTL0013: Operation ("add") failed - address: ([("deployment" => "workbench.war")]) - failure description: {"WFLYCTL0080: Failed services" => {"jboss.deployment.unit.\"workbench.war\".POST_MODULE" => "WFLYSRV0153: Failed to process phase POST_MODULE of deployment \"workbench.war\"
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: java.lang.ClassNotFoundException: org.jboss.errai.bus.server.servlet.DefaultBlockingServlet from [Module \"deployment.workbench.war\" from Service Module Loader]
Caused by: java.lang.ClassNotFoundException: org.jboss.errai.bus.server.servlet.DefaultBlockingServlet from [Module \"deployment.workbench.war\" from Service Module Loader]"}}
07:30:33,664 ERROR [org.jboss.as.server] (management-handler-thread - 1) WFLYSRV0021: Deploy of deployment "workbench.war" was rolled back with the following failure message:
{"WFLYCTL0080: Failed services" =>

{"jboss.deployment.unit.\"workbench.war\".POST_MODULE" => "WFLYSRV0153: Failed to process phase POST_MODULE of deployment \"workbench.war\" Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: java.lang.ClassNotFoundException: org.jboss.errai.bus.server.servlet.DefaultBlockingServlet from [Module \"deployment.workbench.war\" from Service Module Loader] Caused by: java.lang.ClassNotFoundException: org.jboss.errai.bus.server.servlet.DefaultBlockingServlet from [Module \"deployment.workbench.war\" from Service Module Loader]"}

}