I have the same problem. Have tried a clean install and no plugins and always gives:
‘No Results Found
The page you requested could not be found. Try refining your search, or use the navigation above to locate the post.’
Have hundreds of events and every other list (categories, locations, etc.) shows them.
Have added in WP FullCalendar which is sorting and presenting as it should, but search does nothing.
Have looked at all the previous search problems and tried every one of them – location settings seem to be most peoples problem. Have tried these and still same problem.
