I realize that I've not been much help so far. I found this in the www_error.log in the /var/log/php-fpm subdirectory:
[04-Sep-2024 07:37:47 UTC] PHP Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /var/www/html/ubbthreads/libs/bbcode.inc.php:572
Stack trace:
#0 /var/www/html/ubbthreads/libs/bbcode.inc.php(394): bbcode->disallow_tag()
#1 /var/www/html/ubbthreads/libs/bbcode.inc.php(65): bbcode->set_image_limit()
#2 /var/www/html/ubbthreads/libs/html.inc.php(948): bbcode->init_post()
#3 /var/www/html/ubbthreads/scripts/addpost.inc.php(355): html->do_markup()
#4 /var/www/html/ubbthreads/ubbthreads.php(286): page_addpost_run()
#5 {main}
thrown in /var/www/html/ubbthreads/libs/bbcode.inc.php on line 572
This appears to be the issue, but I'm not sure where to go from here. I verified that the bbcode.inc.php file is version 8.0.0.
I asked the hosting company if they could back off php to version 8.2 to see if that made a difference. I have verified that all the same extensios are installed now as were installed previously.
