ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([("subsystem" => "remoting")]) - failure description: {
    "WFLYCTL0412: Required services that are not installed:" => ["org.wildfly.io.worker.default"],
    "WFLYCTL0180: Services with missing/unavailable dependencies" => ["org.wildfly.remoting.endpoint is missing [org.wildfly.io.worker.default]"]

embed-server
/subsystem=io/worker=mypool:add()
/subsystem=remoting:write-attribute(name=worker, value=mypool)
/subsystem=undertow/server=default-server/http-listener=default:write-attribute(name=worker,value=mypool)
/subsystem=undertow/servlet-container=default/setting=websockets:write-attribute(name=worker,value=mypool)
/subsystem=undertow/server=default-server/https-listener=https:write-attribute(name=worker,value=mypool)
/subsystem=io/worker=default:remove()
stop-embed-server

        <subsystem xmlns="urn:jboss:domain:io:3.0">
            <worker name="mypool"/>
            <buffer-pool name="default"/>
        </subsystem>

        <subsystem xmlns="urn:jboss:domain:remoting:4.0">
            <endpoint worker="mypool"/>
            <http-connector name="http-remoting-connector" connector-ref="default" security-realm="ApplicationRealm"/>
        </subsystem>
...
                <http-listener name="default" socket-binding="http" worker="mypool" redirect-socket="https" enable-http2="true"/>
                <https-listener name="https" socket-binding="https" worker="mypool" security-realm="ApplicationRealm" enable-http2="true"/>
...
            <servlet-container name="default">
                <jsp-config/>
                <websockets worker="mypool"/>
            </servlet-container>