When trying to correct this check the following items first.
  • Does the query work? 
    • Check the query being used in the filter to make sure that it's functioning as expected and if it isn't try rebuilding it and making sure that it runs.
  • If the query does work or has been corrected, use the new query in the export. Does it work?
  • If it still is not working try removing the output item of Most Common Visit Type with Details and try running again.
The export should now run without issue.