This might be the problem. I ran a diff on two files that I created: installedPHP.txt and installedPHP8.txt, and there was no difference. So, I looked at the installedPHP8.txt file and found this.
Quote
php74-php-common.x86_64 7.4.33-17.el8.remi @remi-safe
php74-php-intl.x86_64 7.4.33-17.el8.remi @remi-safe
php74-php-json.x86_64 7.4.33-17.el8.remi @remi-safe
php74-runtime.x86_64
I'm pretty sure those should be php83 instead of php74. I've asked the hosting company to check it and update them if that's incorrect.

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