The only thing I found in the log file was this:
[11-Jul-2017 15:35:06 UTC] Error: can’t find tourney tennis-open-10u-boys-green-dot-singles
^ That is the deleted tournament that I removed from the trash.
[11-Jul-2017 15:35:06 UTC] build_tourney_list: no tourneys found
^ That is what happens when I load the games page without recreating the slug for the tournament above.