OPTUS_BrandUI:After entering invalid entries to CustomerID, user can't go back to previous page..

After entering invalid entries to CustomerID, user can't go back to previous page as CANCEL button is not present on Customer Selection window

1.Login to Brand Campaign UI

2.Enter valid Customer ID and click SUBMIT button

3.Click on 'Select Sites' , Customer Selection window displays with 'CANCEL' and 'SUBMIT' button..

4.Enter invalid entries to CustomerID and click on SUBMIT.

5.Internal error dialog box displayed; click on OK button and observe. ---Snapshot attached

Actual result:

As Customer Selection window doesn't have CANCEL button, user can't go back to previous page.

Expected Result:

Customer Selection window should be displayed CANCEL button so that user can go back to Brand UI page.