Uploaded the checker and ran it, with no issues:
PHP Requirements
PHP version 8.1.14.
cURL extension loaded
DOM extension loaded.
GD extension loaded.
Multibyte String extension loaded.
MySQLi extension loaded.
OpenSSL extension loaded.
Session extension loaded.
SimpleXML extension loaded.
XML Parser extension loaded.
XMLReader extension loaded.
XMLWriter extension loaded.
Zip extension loaded.
Exif extension loaded.
You do not have the GMP PHP extension loaded. While this is not required for general use, it is required if you wish to use Web Push Notifications. You may wish to contact your hosting provider or system administrator to ask for it to be installed or consider switching to Invision Cloud Community which has Web Push Notifications enabled.
256M memory limit.
No Suhosin restrictions.
Error messages are as follows (PHP 8.1):
Fatal error: Uncaught Error: Undefined constant "�true�" in /home/5/l/lrforum/forum/conf_global.php:265 Stack trace: #0 /home/5/l/lrforum/forum/system/Settings/Settings.php(56): require() #1 /home/5/l/lrforum/forum/system/Patterns/Singleton.php(41): IPS\_Settings->__construct() #2 /home/5/l/lrforum/forum/system/Http/Url.php(771): IPS\Patterns\_Singleton::i() #3 /home/5/l/lrforum/forum/system/Http/Url.php(248): IPS\Http\_Url::baseUrl() #4 /home/5/l/lrforum/forum/system/Request/Request.php(276): IPS\Http\_Url::createFromString('https://www.lrf...', true, true) #5 /home/5/l/lrforum/forum/system/Log/Log.php(106): IPS\_Request->url() #6 /home/5/l/lrforum/forum/init.php(1034): IPS\_Log::log('Error: Undefine...', 'uncaught_except...') #7 [internal function]: IPS\IPS::exceptionHandler(Object(Error)) #8 {main} thrown in /home/5/l/lrforum/forum/conf_global.php on line 265