Explore by searching produces no results

Explore by searching produces no results

User adds new data to analysis file and clicks on 'Explore by searching' to develop visualizations but all valid search queries produce error "No results seem to match your search". The "Explore by searching" function is not available with in-database data, so if data was brought in with the 'Load Method' set to "Keep data external" then this option will not work.  Consider using 'Start from visualizations' or 'Start from data' to build the analysis file.