Creating RA fails w/o meaningful error message

Target Builds: jboss-as-7.1 Final and EAP 6 Alpha 2
Runtime: standalone as well as domain mode

Step 1: Start server
Step 2: Login to management console
Step 3: Go to profile->resource adapter-> Click on "add" to add a new resource adapter
Step 4: Provide input for Archive file and transaction attribute and click "save", configuration saved correctly and UI shows creation of Resource Adapter
Step 5: Click on "View" link for the newly configured resource adapter to go to next screen to add a "Managed Conection Definition"
Step 6: Provide JNDI Name and Connection class name click on "Next"
Step 7: Provide properties (optional)
Step 8: Click on save

Operation fails with error as shown in attachment. Only we can add a resource adapter is via direct manipulation of domain.xml file (or standalone.xml) which is not a desirable way going forward.