Help me out

[root@LibreNMS librenms]# ./validate.php

Component Version
LibreNMS 1.43-119-g6242f94
DB Schema 268
PHP 7.2.9
MySQL 5.5.60-MariaDB
RRDTool 1.4.8
SNMP NET-SNMP 5.7.2

====================================

[OK] Composer Version: 1.7.2
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[FAIL] The poller (CACTI) has not completed within the last 5 minutes, check the cron job.
[FAIL] The poller (LibreNMS) has not completed within the last 5 minutes, check the cron job.
[WARN] Some devices have not been polled in the last 5 minutes. You may have performance issues.
[FIX] Check your poll log and see: http://docs.librenms.org/Support/Performance/

[FAIL] Discovery has not completed in the last 24 hours.
[FIX] Check the cron job to make sure it is running and using discovery-wrapper.py
[root@LibreNMS librenms]#

Check /var/spool/mail/librenms if you have any info there what is taking long time. (should be in the end of the file)