Error reading from database when attempting a messages advanced search for a person in my courses

Attempting a messages advanced search for a person with 'Only in my courses' ticked.

Error reading from database

Debug info: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM mdl_user u, mc.id as contactlistid, mc.blocked
' at line 2
SELECT u.id,u.picture,u.firstname,u.lastname,u.imagealt,u.email,
FROM mdl_user u, mc.id as contactlistid, mc.blocked
JOIN mdl_role_assignments ra ON ra.userid = u.id
LEFT JOIN mdl_message_contacts mc
ON mc.contactid = u.id AND mc.userid = ?
WHERE u.deleted = '0' AND u.confirmed = '1'
AND ra.contextid IN (10,3,1)
AND (LOWER(CONCAT(firstname, ' ', lastname)) LIKE LOWER COLLATE utf8_bin ESCAPE '
')

[array (
0 => '4',
1 => '%sally%',
)]
Stack trace:

• line 391 of /lib/dml/moodle_database.php: dml_read_exception thrown
• line 790 of /lib/dml/mysqli_native_moodle_database.php: call to moodle_database->query_end()
• line 1454 of /message/lib.php: call to mysqli_native_moodle_database->get_records_sql()
• line 979 of /message/lib.php: call to message_search_users()
• line 615 of /message/lib.php: call to message_print_search_results()
• line 302 of /message/index.php: call to message_print_search()