Graphs problem

Help
1

Hello

I ahve problem with with graphs from traffic device. Here is the screenshot as u can see there is no graphs. Interesting is that when i make refresh sometimes graphs are coming but says error grapic

1280×725 157 KB

1280×605 57 KB

2

please run ./validate.php

3

./validate.php

Component Version
LibreNMS 1.66-44-g2b0643086
DB Schema 2020_07_29_143221_add_device_perf_index (172)
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: 1.10.10
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct