WFLYWELD0037: Error injecting persistence unit into CDI managed bean

Boa Tarde, estou com problema de conectar ao bando de dados. Esta dando o erro abaixo. Segui todos os passo do curso, mas não consegui resolver

Caused by: java.lang.IllegalArgumentException: WFLYWELD0037: Error injecting persistence unit into CDI managed bean. Can't find a persistence unit named 'entityManager' in deployment webcasacodigo.war for injection point private javax.persistence.EntityManager br.com.casadocodigo.dao.LivroDao.entityManager
    at org.jboss.as.weld.services.bootstrap.WeldJpaInjectionServices.getScopedPUName(WeldJpaInjectionServices.java:114)
    at org.jboss.as.weld.services.bootstrap.WeldJpaInjectionServices.registerPersistenceContextInjectionPoint(WeldJpaInjectionServices.java:77)
    at org.jboss.weld.injection.ResourceInjectionFactory$PersistenceContextResourceInjectionProcessor.getResourceReferenceFactory(ResourceInjectionFactory.java:351)
    at org.jboss.weld.injection.ResourceInjectionFactory$PersistenceContextResourceInjectionProcessor.getResourceReferenceFactory(ResourceInjectionFactory.java:339)
    at org.jboss.weld.injection.ResourceInjectionFactory$ResourceInjectionProcessor.createFieldResourceInjection(ResourceInjectionFactory.java:217)
    at org.jboss.weld.injection.ResourceInjectionFactory$ResourceInjectionProcessor.createResourceInjections(ResourceInjectionFactory.java:189)
    at org.jboss.weld.injection.ResourceInjectionFactory.discoverType(ResourceInjectionFactory.java:449)
    at org.jboss.weld.injection.ResourceInjectionFactory.getResourceInjections(ResourceInjectionFactory.java:97)
    at org.jboss.weld.injection.producer.ResourceInjector.<init>(ResourceInjector.java:59)
    at org.jboss.weld.injection.producer.ResourceInjector.of(ResourceInjector.java:49)
    at org.jboss.weld.injection.producer.BeanInjectionTarget.<init>(BeanInjectionTarget.java:63)
    at org.jboss.weld.injection.producer.BeanInjectionTarget.createDefault(BeanInjectionTarget.java:47)
    at org.jboss.weld.manager.InjectionTargetFactoryImpl.chooseInjectionTarget(InjectionTargetFactoryImpl.java:113)
    at org.jboss.weld.manager.InjectionTargetFactoryImpl.createInjectionTarget(InjectionTargetFactoryImpl.java:86)
    at org.jboss.weld.bean.ManagedBean.<init>(ManagedBean.java:100)
    at org.jboss.weld.bean.ManagedBean.of(ManagedBean.java:80)
    at org.jboss.weld.bootstrap.AbstractBeanDeployer.createManagedBean(AbstractBeanDeployer.java:261)
    at org.jboss.weld.bootstrap.BeanDeployer.createClassBean(BeanDeployer.java:228)
    at org.jboss.weld.bootstrap.ConcurrentBeanDeployer$2.doWork(ConcurrentBeanDeployer.java:78)
    at org.jboss.weld.bootstrap.ConcurrentBeanDeployer$2.doWork(ConcurrentBeanDeployer.java:75)
    at org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:63)
    at org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:56)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
    at org.jboss.threads.JBossThread.run(JBossThread.java:320)

persistence.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    version="2.1" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
    http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="webcasacodigo-dev" transaction-type="JTA">
        <description>Dev persistence unit</description>
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <!-- java transaction api || JNDI -->
        <jta-data-source>java:jboss/datasources/casadocodigoDS</jta-data-source>
        <properties>
            <property name="hibernate.hbm2ddl.auto" value="update"/>
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.format_sql" value="true" />
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect"/>
        </properties>
    </persistence-unit>
</persistence>


Data source 

<datasource jndi-name="java:jboss/datasources/casadocodigoDS" pool-name="casadocodigoDS">
                    <connection-url>jdbc:mysql://localhost:3306/casadocodigo_javaee</connection-url>
                    <connection-property name="DatabaseName">casadocodigo_javaee</connection-property>
                    <driver>mysql</driver>
                    <pool>
                        <min-pool-size>10</min-pool-size>
                        <max-pool-size>20</max-pool-size>
                    </pool>
                    <security>
                        <user-name>root</user-name>
                        <password>roruas12</password>
                    </security>
                </datasource>