Unable to access TransactionManager or UserTransaction to make physical transaction delegate in EAP

Issue

• We're trying to setup a new EAR project and we're having issues with setting up persistence. Everything starts up okay, but at run time we're getting the error Unable to access TransactionManager or UserTransaction to make physical transaction delegate. We're not sure what we're missing.

• We're using JBoss EAP 7. This issue has been occurred at run time when we try to get the EntityManager

• We're getting the below error:

Caused by: org.hibernate.resource.transaction.backend.jta.internal.JtaPlatformInaccessibleException: Unable to access TransactionManager or UserTransaction to make physical transaction delegate
    at org.hibernate.resource.transaction.backend.jta.internal.JtaTransactionCoordinatorImpl.makePhysicalTransactionDelegate(JtaTransactionCoordinatorImpl.java:229)
    at org.hibernate.resource.transaction.backend.jta.internal.JtaTransactionCoordinatorImpl.getTransactionDriverControl(JtaTransactionCoordinatorImpl.java:203)
    at org.hibernate.engine.transaction.internal.TransactionImpl.<init>(TransactionImpl.java:36)
    at org.hibernate.internal.AbstractSessionImpl.getTransaction(AbstractSessionImpl.java:313)
    at org.hibernate.internal.SessionImpl.<init>(SessionImpl.java:278)
    at org.hibernate.internal.SessionFactoryImpl$SessionBuilderImpl.openSession(SessionFactoryImpl.java:1327)
    at org.hibernate.jpa.internal.EntityManagerImpl.internalGetSession(EntityManagerImpl.java:133)
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:174)
    at org.hibernate.jpa.internal.EntityManagerImpl.<init>(EntityManagerImpl.java:83)
    at org.hibernate.jpa.internal.EntityManagerFactoryImpl.internalCreateEntityManager(EntityManagerFactoryImpl.java:319)
    at org.hibernate.jpa.internal.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:286)

    ... 32 more