Good morning,
I am testing osTicket, trying to make news Queues an appear this problem, it keeps freeze:

At error.log from Apache, appear the next line:
[Wed Mar 09 08:48:44.869665 2022] [proxy_fcgi:error] [pid 6163] [client xx.xx.xx.xx:xxxxx] AH01071:
Got error 'PHP message: PHP Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, string given in /var/www/html/support/include/class.queue.php:2948\n
Stack trace:\n
#0 /var/www/html/support/include/ajax.admin.php(231): QueueSort->update()\n
#1 /var/www/html/support/include/class.dispatcher.php(145): AdminAjaxAPI->addQueueSort()\n
#2 /var/www/html/support/include/class.dispatcher.php(38): UrlMatcher->dispatch()\n
#3 /var/www/html/support/include/class.dispatcher.php(120): Dispatcher->resolve()\n
#4 /var/www/html/support/include/class.dispatcher.php(38): UrlMatcher->dispatch()\n
#5 /var/www/html/support/include/class.dispatcher.php(120): Dispatcher->resolve()\n
#6 /var/www/html/support/include/class.dispatcher.php(38): UrlMatcher->dispatch()\n
#7 /var/www/html/support/scp/ajax.php(316): Dispatcher->resolve()\n
#8 {main}\n
thrown in /var/www/html/support/include/class.queue.php on line 2948', referer: http://xx.xx.xx.xx/support/scp/queues.php?id=16
This is my system information dashboard:

Thanks for your time,
Best regards,