As mentioned in the error-message, the problem was about storing the metadata. So whatever this metadata actually is in this case, disabling the "Persist layer metadata"-option will make the export work and the DBF-file is created. Also ensure you uncheck any geometry-field from the export. Finally the SHPT-field should be left empty (although that won't prevent the export from functioning, but just creates a table having an empty geometry-column).  

Be aware, though, that the new table isn't directly added to the map even though the "Add saved file to map"-option is active, probably because we didn't really create a shapefile although we requested QGIS to do so. So you have to manually add it via Layer--> Add Layer-->Add vector layer (strange, I know) and here you can add any arbitrary file:

As mentioned in the error message, the problem was with storing the metadata. So whatever this metadata actually is in this case, disabling the "Persist layer metadata"-option will make the export work and the DBF-file is created. Also ensure you uncheck any geometry-field from the export. 

Finally the SHPT-field should be left empty (although that won't prevent the export from functioning, but just creates a table having an empty geometry-column). 

Be aware, though, that the new table isn't directly added to the map even though the "Add saved file to map" option is active, probably because we didn't really create a shapefile, although we requested QGIS to do so. So you have to manually add it via Layer  -> Add Layer  -> Add vector layer (strange, I know), and here you can add any arbitrary file:

As mentioned in the error-message, the problem was about storing the metadata. So whatever this metadata actually is in this case, disabling the "Persist layer metadata"-option will make the export work and the DBF-file is created.

Be aware, though, that the new table isn't directly added to the map even though the "Add saved file to map"-option is active, probably because we didn't really create a shapefile although we requested QGIS to do so. So you have to manually add it via Layer--> Add Layer-->Add vector layer (strange, I know) and here you can add any arbitrary file:

As mentioned in the error-message, the problem was about storing the metadata. So whatever this metadata actually is in this case, disabling the "Persist layer metadata"-option will make the export work and the DBF-file is created. Also ensure you uncheck any geometry-field from the export. Finally the SHPT-field should be left empty (although that won't prevent the export from functioning, but just creates a table having an empty geometry-column).

Be aware, though, that the new table isn't directly added to the map even though the "Add saved file to map"-option is active, probably because we didn't really create a shapefile although we requested QGIS to do so. So you have to manually add it via Layer--> Add Layer-->Add vector layer (strange, I know) and here you can add any arbitrary file: