UCP locks up trying to display Call History

Thanks for the very prompt reply. This is from the Java console, let me know if you eed more:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://pbx.XXXXXXXXX:8001/socket.io/?token=4fd7bf1f86733a108d710894402d6e43&EIO=3&transport=polling&t=1447980838578-4. (Reason: CORS request failed).
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://pbx.XXXXXXXXX:8001/socket.io/?token=4fd7bf1f86733a108d710894402d6e43&EIO=3&transport=polling&t=1447980844825-5. (Reason: CORS request failed).
TypeError: a is undefined jquery-1.11.3.min.js:2:2817
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://pbx.XXXXXXXXX:8001/socket.io/?token=4fd7bf1f86733a108d710894402d6e43&EIO=3&transport=polling&t=1447980850836-6. (Reason: CORS request failed).
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://pbx.XXXXXXXXX:8001/socket.io/?token=4fd7bf1f86733a108d710894402d6e43&EIO=3&transport=polling&t=1447980857099-7. (Reason: CORS request failed).