You would get complete stack trace in ardebug.log to get more clarity where does it throws NPE. You can raise support case with BMC.
One thing, Do you get this error for all forms?
If it is just for this form, then you can try to modify form in Developer studio since selected Form is Vendor form.
Using Developer Studio in Base Development mode to enable search mode and new mode. Out of the box, the License Review form does not provide Search mode or New mode.