The problem is, I'm not seeing any errors. When I click on the button, nothing happens. This happens in both Safari Version 13.0.5 (15608.5.11) and Chrome Version 80.0.3987.132 (Official Build) (64-bit). I even have the Developer Toolbar enabled in Safari and Developer Mode enabled in Chrome.

The Stovebolt Geek
https://www.stovebolt.com/ubbthreads/ubbthreads.php

Server Information
UBB.threads Version 8.0.0
Release 20240826
Server OS Linux
Server Load 0.11
Web Server Apache/2.4.37
PHP Version 8.3.11
MYSQL Version 8.0.39
Database Size 1.82 GB