I have the same issue:
PHP 7.2.10
mysql Ver 15.1 Distrib 5.5.60-MariaDB
[SELECT COUNT(DISTINCT CASE WHEN A1.dept_id
= 7 THEN A1.ticket_id
END) AS q20
, COUNT(DISTINCT CASE WHEN A1.dept_id
= 7 THEN A1.ticket_id
END) AS q21
, COUNT(DISTINCT CASE WHEN A1.dept_id
= 7 THEN A1.ticket_id
END) AS q22
, COUNT(DISTINCT CASE WHEN A2.state
= 'open' AND A2.state
= 'open' AND A1.dept_id
= 7 THEN A1.ticket_id
END) AS q23
, COUNT(DISTINCT CASE WHEN A1.dept_id
= 7 THEN A1.ticket_id
END) AS q24
, COUNT(DISTINCT CASE WHEN THEN A1.ticket_id
END) AS q25
, COUNT(DISTINCT CASE WHEN A1.dept_id
= 7 THEN A1.ticket_id
END) AS q26
, COUNT(DISTINCT CASE WHEN A2.state
= 'open' AND A1.isanswered
= '1' AND A2.state
= 'open' AND A1.isanswered
= '1' AND A2.id
IN (11) THEN A1.ticket_id
END) AS q30
, COUNT(DISTINCT CASE WHEN A2.state
= 'open' THEN A1.ticket_id
END) AS q1
, COUNT(DISTINCT CASE WHEN A2.state
= 'open' AND A2.state
= 'open' AND A1.isanswered
= '0' THEN A1.ticket_id
END) AS q2
, COUNT(DISTINCT CASE WHEN (A1.team_id
IN (8) OR A1.staff_id
IN (9)) AND A2.state
= 'open' AND (A1.team_id
IN (8) OR A1.staff_id
IN (9)) AND A2.state
= 'open' AND A1.staff_id
IN (9) THEN A1.ticket_id
END) AS q6
, COUNT(DISTINCT CASE WHEN A2.state
= 'closed' AND A2.state
= 'closed' AND A1.closed
BETWEEN '2019-06-15 00:00:00' AND '2019-06-15 23:59:59' THEN A1.ticket_id
END) AS q9
, COUNT(DISTINCT CASE WHEN A2.state
= 'open' AND A2.state
= 'open' AND A1.isanswered
= '1' THEN A1.ticket_id
END) AS q3
, COUNT(DISTINCT CASE WHEN (A1.team_id
IN (8) OR A1.staff_id
IN (9)) AND A2.state
= 'open' AND (A1.team_id
IN (8) OR A1.staff_id
IN (9)) AND A2.state
= 'open' AND NOT A1.staff_id
IN (9) THEN A1.ticket_id
END) AS q7
, COUNT(DISTINCT CASE WHEN A2.state
= 'closed' AND A2.state
= 'closed' AND A1.closed
BETWEEN '2019-06-14 00:00:00' AND '2019-06-14 23:59:59' THEN A1.ticket_id
END) AS q10
, COUNT(DISTINCT CASE WHEN A2.state
= 'open' AND A2.state
= 'open' AND A1.isoverdue
= '1' THEN A1.ticket_id
END) AS q4
, COUNT(DISTINCT CASE WHEN (A1.team_id
IN (8) OR A1.staff_id
IN (9)) AND A2.state
= 'open' THEN A1.ticket_id
END) AS q5
, COUNT(DISTINCT CASE WHEN A2.state
= 'closed' AND A2.state
= 'closed' AND A1.closed
BETWEEN '2019-06-10 00:00:00' AND '2019-06-16 23:59:59' THEN A1.ticket_id
END) AS q11
, COUNT(DISTINCT CASE WHEN A2.state
= 'closed' THEN A1.ticket_id
END) AS q8
, COUNT(DISTINCT CASE WHEN A2.state
= 'closed' AND A2.state
= 'closed' AND A1.closed
BETWEEN '2019-06-01 00:00:00' AND '2019-06-30 23:59:59' THEN A1.ticket_id
END) AS q12
, COUNT(DISTINCT CASE WHEN A2.state
= 'closed' AND A2.state
= 'closed' AND A1.closed
BETWEEN '2019-04-01 00:00:00' AND '2019-06-30 23:59:59' THEN A1.ticket_id
END) AS q13
, COUNT(DISTINCT CASE WHEN A2.state
= 'closed' AND A2.state
= 'closed' AND A1.closed
BETWEEN '2019-01-01 00:00:00' AND '2019-12-31 23:59:59' THEN A1.ticket_id
END) AS q14
FROM ost_ticket
A1 JOIN ost_ticket_status
A2 ON (A1.status_id
= A2.id
) LEFT JOIN ost_thread
A3 ON (A3.object_type
= 'T' AND A1.ticket_id
= A3.object_id
) LEFT JOIN ost_thread_referral
A4 ON (A3.id
= A4.thread_id
) LEFT JOIN ost_staff
A5 ON (A4.object_type
= 'S' AND A4.object_id
= A5.staff_id
) LEFT JOIN ost_team
A6 ON (A4.object_type
= 'E' AND A4.object_id
= A6.team_id
) LEFT JOIN ost_department
A7 ON (A4.object_type
= 'D' AND A4.object_id
= A7.id
) WHERE (A2.state
= 'open' AND (A1.staff_id
= 9 OR A5.staff_id
= 9 OR A1.team_id
IN (8) OR A6.team_id
IN (8))) OR A1.dept_id
IN (4, 7, 11) OR A7.id
IN (4, 7, 11)]
You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'THEN A1.ticket_id
END) AS q25
, COUNT(DISTINCT CASE WHEN A1.dept_id
= 7 THE' at line 1<br />
<br />
---- Backtrace ----<br />
#0 (root)/include/mysqli.php(199): osTicket->logDBError('DB Error #1064', '[SELECT COUNT(D...')<br />
#1 (root)/include/class.orm.php(3455): db_query('SELECT COUNT(DI...', true, true)<br />
#2 (root)/include/class.orm.php(3502): MySqlExecutor->execute()<br />
#3 (root)/include/class.orm.php(2085): MySqlExecutor->getArray()<br />
#4 (root)/include/class.orm.php(2035): HashArrayIterator->{closure}()<br />
#5 (root)/include/class.orm.php(2014): CallbackSimpleIterator->next()<br />
#6 (root)/include/class.orm.php(2023): CallbackSimpleIterator->rewind()<br />
#7 (root)/include/class.orm.php(1695): CallbackSimpleIterator->valid()<br />
#8 (root)/include/class.orm.php(1705): CachedResultSet->fillTo(9223372036854775807)<br />
#9 (root)/include/class.orm.php(1328): CachedResultSet->asArray()<br />
#10 (root)/include/class.orm.php(1351): QuerySet->all()<br />
#11 (root)/include/class.search.php(925): QuerySet->one()<br />
#12 (root)/include/class.search.php(865): SavedQueue::counts(Object(StaffSession), true)<br />
#13 (root)/include/staff/templates/queue-tickets.tmpl.php(96): SavedQueue->getCount(Object(StaffSession))<br />
#14 (root)/scp/tickets.php(526): require_once('/opt/osTicket-1...')<br />
#15 {main}