Error deleting poller and error rediscovering device

Hi

./validate.php

Component Version
LibreNMS 1.65-19-ge5bb6d80b
DB Schema 2020_06_23_00522_alter_availability_perc_column (170)
PHP 7.2.24-0ubuntu0.18.04.6
Python 3.6.9
MySQL 10.1.44-MariaDB-0ubuntu0.18.04.1
RRDTool 1.7.0
SNMP NET-SNMP 5.7.3
====================================

[OK] Composer Version: 1.10.8
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct

Anyone know how to resolve this or to troubleshoot

And this

Set the base_url setting in LibreNMS and/or server_name in your webserver config appropriately.

THANKS MAN!!!

That works!