504 Gateway Timeout Error when accessing the About page


Component Version
LibreNMS 23.7.0-52-g65b4db817 (2023-08-03T17:55:09-07:00)
DB Schema 2023_08_02_120455_vendor_ouis_unique_index (255)
PHP 8.1.2-1ubuntu2.13
Python 3.10.12
Database MariaDB 10.6.12-MariaDB-0ubuntu0.22.04.1
RRDTool 1.7.2
SNMP 5.9.1

[OK] Composer Version: 2.5.8
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database Schema is current
[OK] SQL Server meets minimum requirements
[OK] lower_case_table_names is enabled
[OK] MySQL engine is optimal
[OK] Database and column collations are correct
[OK] Database schema correct
[OK] MySQl and PHP time match
[OK] Active pollers found
[OK] Dispatcher Service not detected
[OK] Locks are functional
[OK] Python poller wrapper is polling
[OK] Redis is unavailable
[OK] rrdtool version ok
[OK] Connected to rrdcached

I am encountering a recurring problem while attempting to access the About page on our LibreNMS instance. Whenever I try to access the page at https://librenms.example.domain/about , a 504 Gateway Timeout error is displayed.

When I check the nginx error.log, I see this error:

[error] 1607021#1607021: *1 upstream timed out (110: Unknown error) while reading response header from upstream, client:, server: librenms.example.domain, request: “GET /about HTTP/2.0”, upstream: “fastcgi://unix:/run/php-fpm-librenms.sock”, host: “librenms.example.domain”, referrer: “librenms.example.domain”

It only happens on the about page; everything else works without a problem.

Does anyone knows how to fix it?

Thank you