Access Frobidden

Vaadin 6 / 7 / 8
1

I am using javaEE7 with Vaadin 8 - wildfly12 - Hibernate
For long time my application worked.
Now i get an error in the Webbrowser: Access Forbidden.

My webxml is:

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4"
	xmlns="http://java.sun.com/xml/ns/j2ee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
	<display-name>AppFrontend</display-name>
	<context-param>
		<description>Vaadin production mode</description>
		<param-name>productionMode</param-name>
		<param-value>false</param-value>
	</context-param>
	<servlet>
		<servlet-name>App</servlet-name>
		<servlet-class>com.vaadin.cdi.server.VaadinCDIServlet</servlet-class>
		<init-param>
			<description>Vaadin UI class to use</description>
			<param-name>UI</param-name>
			<param-value>org.app.view.MainUI</param-value>
		</init-param>
		<init-param>
			<description>Legacy mode to return the value of the property as a string from AbstractProperty.toString()</description>
			<param-name>legacyPropertyToString</param-name>
			<param-value>false</param-value>
		</init-param>
	</servlet>
	<servlet-mapping>
		<servlet-name>App</servlet-name>
		<url-pattern>/*</url-pattern>
	</servlet-mapping>
	<listener>
		<listener-class>com.vaadin.cdi.internal.ContextDeployer</listener-class>
	</listener>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
</web-app>

My MainUI is:

@Theme("appui")
@CDIUI("")
public class MainUI extends UI {
	@Inject
	PersonView personView;

	@Override
	protected void init(VaadinRequest request) {
		final VerticalLayout mainLayout = new VerticalLayout();
		final CssLayout menuView = new CssLayout();
		final CssLayout contentView = new CssLayout();

		mainLayout.addComponent(menuView);
		mainLayout.addComponent(contentView);
		mainLayout.setMargin(true);
		mainLayout.setSpacing(true);
		setContent(mainLayout);
		setContent(personView);

	}
}

The error-Message is:

15:54:16,124 INFO  [org.hibernate.tool.schema.internal.SchemaCreatorImpl]
 (ServerService Thread Pool -- 63) HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@78b50d8'
15:54:16,130 INFO  [org.hibernate.hql.internal.QueryTranslatorFactoryInitiator]
 (ServerService Thread Pool -- 63) HHH000397: Using ASTQueryTranslatorFactory
15:54:16,153 INFO  [io.undertow.servlet]
 (ServerService Thread Pool -- 70) Initializing AtmosphereFramework
15:54:16,177 INFO  [com.vaadin.cdi.internal.ContextDeployer]
 (ServerService Thread Pool -- 70) Initializing web context for path /AppFrontend
15:54:16,178 INFO  [com.vaadin.cdi.internal.ContextDeployer]
 (ServerService Thread Pool -- 70) Discovering Vaadin UIs...
15:54:16,178 INFO  [com.vaadin.cdi.internal.ContextDeployer]
 (ServerService Thread Pool -- 70) 0 beans inheriting from UI discovered!
15:54:16,178 INFO  [com.vaadin.cdi.internal.ContextDeployer]
 (ServerService Thread Pool -- 70) Available Vaadin UIs for CDI deployment []
15:54:16,178 WARNING [com.vaadin.cdi.internal.ContextDeployer]
 (ServerService Thread Pool -- 70) No Vaadin UI classes with @CDIUI annotation found. Skipping automated deployment of VaadinCDIServlet.
15:54:16,179 INFO  [com.vaadin.cdi.internal.ContextDeployer]
 (ServerService Thread Pool -- 70) Done deploying Vaadin UIs
15:54:16,272 INFO  [org.wildfly.extension.undertow]
 (ServerService Thread Pool -- 70) WFLYUT0021: Registered web context: '/AppFrontend' for server 'default-server'
15:54:16,279 WARN  [org.jboss.weld.Bootstrap]
 (MSC service thread 1-2) WELD-000146: BeforeBeanDiscovery.addAnnotatedType(AnnotatedType<?>) used for class org.hibernate.validator.internal.cdi.interceptor.ValidationInterceptor is deprecated from CDI 1.1!
15:54:16,280 WARN  [org.jboss.weld.Bootstrap]
 (MSC service thread 1-2) WELD-000146: BeforeBeanDiscovery.addAnnotatedType(AnnotatedType<?>) used for class com.sun.faces.flow.FlowDiscoveryCDIHelper is deprecated from CDI 1.1!
15:54:16,281 WARN  [org.jboss.weld.Bootstrap]
 (MSC service thread 1-2) WELD-000146: BeforeBeanDiscovery.addAnnotatedType(AnnotatedType<?>) used for class org.jberet.creation.BatchBeanProducer is deprecated from CDI 1.1!
15:54:16,412 INFO  [org.jboss.ejb.client]
 (ServerService Thread Pool -- 70) JBoss EJB Client version 4.0.9.Final