3587656 - Custom Application: SAPUI5 smartTable with filters useExportToExcel disabled

• In designing a custom UI5 SmartTables application with useExportToExcel, the feature is disabled and why is that?
• Seeing the following error while duplicating the issue:
  
  -----Error Console------
  

  Failed to load resource: the server responded with a status of 404 (Not found)

  Uncaught (in promise) The provided 'columnKeys' and columns are inconsistent. For the column '__column0' no entry in 'columnKeys' exists.

  ----end error----------
• Sample code in the IDE:
  
  ----Sample code------
  

  <smartTable:SmartTable id="idTileDetailsFilter" smartFilterId="idTileDetailsFilter" useTablePersonalisation="true" entitySet="ZApplication" showRowCount="true"

                               tableType="ResponsiveTable" demandPopin="true" useVariantManagement="true" beforeRebindTable="beforeRebindTable"

                              enableAutoBinding="true" class="sapUiResponsiveContentPadding" >
  ---end sample code--

• SAPUI5 1.71.21
• SAP Netweaver Application Server 7.52

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