Go to Circulation and try go click on the Hold Ratios report. ( /cgi-bin/koha/circ/reserveratios.pl ) CGI::Compile::ROOT::kohadevbox_koha_circ_reserveratios_2epl::reserveratios_2epl(): DBI Exception: DBD::mysql::st execute failed: 'koha_kohadev.reserves.reservedate' isn't in GROUP BY at /usr/share/perl5/CGI/Emulate/PSGI.pm line 30 at /usr/share/perl5/DBIx/Class/Exception.pm line 77
In koha-testing-docker, If I turn off SQL strict mode I can access the page. So I'm not sure if this is a Koha bug or just a koha-testing-docker thing.
It's neither - it's a known issue with MySQL strict mode. *** This bug has been marked as a duplicate of bug 21941 ***