There is no error on the page, but it remains empty, even while holds queue shows you holds. The logs reveal: DBD::mysql::st execute failed: 'koha_kohadev.reserves.reserve_id' isn't in GROUP BY [for Statement "SELECT min(reservedate) as l_reservedate, reserves.reserve_id, reserves.borrowernumber as borrowernumber, GROUP_CONCAT(DISTINCT items.holdingbranch ORDER BY items.itemnumber SEPARATOR '|') l_holdingbranch, reserves.biblionumber, reserves.branchcode as l_branch, reserves.itemnumber, items.holdingbranch, items.homebranch, GROUP_CONCAT(DISTINCT items.itype ORDER BY items.itemnumber SEPARATOR '|') l_item_type, GROUP_CONCAT(DISTINCT items.location ORDER BY items.itemnumber SEPARATOR '|') l_location, GROUP_CONCAT(DISTINCT items.itemcallnumber ORDER BY items.itemnumber SEPARATOR '|') l_itemcallnumber, GROUP_CONCAT(DISTINCT items.enumchron ORDER BY items.itemnumber SEPARATOR '|') l_enumchron, GROUP_CONCAT(DISTINCT items.copynumber ORDER BY items.itemnumber SEPARATOR '|') l_copynumber, biblio.title, biblio.subtitle, biblio.medium, biblio.part_number, biblio.part_name, biblio.author, biblioitems.editionstatement, count(DISTINCT items.itemnumber) as icount, count(DISTINCT reserves.borrowernumber) as rcount, borrowers.firstname, borrowers.surname FROM reserves LEFT JOIN items ON items.biblionumber=reserves.biblionumber LEFT JOIN biblio ON reserves.biblionumber=biblio.biblionumber LEFT JOIN biblioitems ON biblio.biblionumber=biblioitems.biblionumber LEFT JOIN branchtransfers ON items.itemnumber=branchtransfers.itemnumber LEFT JOIN issues ON items.itemnumber=issues.itemnumber LEFT JOIN borrowers ON reserves.borrowernumber=borrowers.borrowernumber LEFT JOIN circulation_rules ON ( items.itype=circulation_rules.itemtype AND rule_name = 'holdallowed' AND circulation_rules.branchcode IS NULL AND circulation_rules.categorycode IS NULL ) WHERE reserves.found IS NULL AND reservedate >= ? AND reservedate <= ? AND (reserves.itemnumber IS NULL OR reserves.itemnumber = items.itemnumber) AND items.itemnumber NOT IN (SELECT itemnumber FROM branchtransfers where datearrived IS NULL) AND items.itemnumber NOT IN (select itemnumber FROM reserves where found IS NOT NULL) AND issues.itemnumber IS NULL AND reserves.priority <> 0 AND reserves.suspend = 0 AND notforloan = 0 AND itemlost = 0 AND withdrawn = 0 AND ( circulation_rules.rule_value IS NULL OR circulation_rules.rule_value != 0 ) GROUP BY reserves.biblionumber ORDER BY biblio.title " with ParamValues: 0='2020-07-06', 1='2020-07-20'] at /home/vagrant/kohaclone/circ/pendingreserves.pl line 245.
*** This bug has been marked as a duplicate of bug 22431 ***