microlearning cron failure

[Malcolm-GetAHead]

I'm receiving the following error in the cron output. This is a newly deployed instance of tag IOMAD_403_3:

Execute scheduled task: IOMAD microlearning cron (block_iomad_microlearning\task\cron_task)
... started 18:33:57. Current memory use 41.7 MB.
Debugging increased temporarily due to faildelay of 60
starting block_microlearning cron at 1713807237
getting list of users who have a new nugget
... used 2 dbqueries
... used 0.0093162059783936 seconds
Scheduled task failed: IOMAD microlearning cron (block_iomad_microlearning\task\cron_task),Error reading from database
Debug info:
ERROR:  operator does not exist: bytea = integer
LINE 3: ...           ON (mtu.threadid = mt.id AND mt.send_message = 1)
                                                                   ^
HINT:  No operator matches the given name and argument types. You might need to add explicit type casts.
SELECT mtu.*, mt.companyid FROM mdl_microlearning_thread_user mtu
                                                   JOIN mdl_microlearning_thread mt
                                                   ON (mtu.threadid = mt.id AND mt.send_message = 1)
                                                   AND mtu.message_delivered = 0
                                                   WHERE mtu.timecompleted IS NULL
                                                   AND mtu.schedule_date < $1
[array (
  0 => 1713807237,
)]
Backtrace:
* line 293 of /lib/dml/moodle_read_slave_trait.php: call to moodle_database->query_end()
* line 358 of /lib/dml/pgsql_native_moodle_database.php: call to pgsql_native_moodle_database->read_slave_query_end()
* line 1044 of /lib/dml/pgsql_native_moodle_database.php: call to pgsql_native_moodle_database->query_end()
* line 977 of /blocks/iomad_microlearning/lib.php: call to pgsql_native_moodle_database->get_records_sql()
* line 46 of /blocks/iomad_microlearning/classes/task/cron_task.php: call to microlearning::cron()
* line 405 of /lib/classes/cron.php: call to block_iomad_microlearning\task\cron_task->execute()
* line 208 of /lib/classes/cron.php: call to core\cron::run_inner_scheduled_task()
* line 125 of /lib/classes/cron.php: call to core\cron::run_scheduled_tasks()
* line 186 of /admin/cli/cron.php: call to core\cron::run_main_process()
*