2501303 - "Internal Server Error" while generating stack xml for Track in Maintenance Planner

While trying to generate stack xml for a defined Track in Maintenance Planner, you will get following error:
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An exception occurred; Refresh the application to continue. Please attach the log file and raise an SAP Support Ticket
Response Code : 500
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And further in logs you could see below error:
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<H1>500 SAP Internal Server Error</H1>
ERROR: Access using a &#39;ZERO&#39; object reference is not possible. (termination: RABAX_STATE)<P>
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Tracks in Maintenance Planner

Maintenance planner, MP, Track, RABAX_STATE, Internal, 500, Error, Object, Reference , KBA , BC-UPG-MP , Maintenance Planning Tools , Problem