I experience a few issues on my osTicket installation regarding queues:

trying to configure columns (for instance: numbers) -> blank pop up box
Adding a new sorting criteria triggers an error 500

Here's my server information:

A sample of my apache error log:

[Tue Oct 08 11:59:28.188388 2019] [php7:error] [pid 14360] [client 172.16.181.4:58197] PHP Fatal error: Uncaught TypeError: Argument 1 passed to AnnotatedModel:
:wrap() must be an instance of VerySimpleModel, null given, called in /var/www/osticket/include/class.queue.php on line 2738 and defined in /var/www/osticket/inc
lude/class.orm.php:760\nStack trace:\n#0 /var/www/osticket/include/class.queue.php(2738): AnnotatedModel::wrap(NULL, Object(QueueColumnGlue))\n#1 /var/www/ostick
et/include/class.queue.php(2771): QueueColumnListBroker->add(NULL, Object(QueueColumnGlue))\n#2 /var/www/osticket/include/class.queue.php(1278): QueueColumnListB
roker->updateColumns(Array, Array, Array)\n#3 /var/www/osticket/include/ajax.search.php(335): CustomQueue->update(Array)\n#4 /var/www/osticket/include/class.disp
atcher.php(145): SearchAjaxAPI->previewQueue('3/')\n#5 /var/www/osticket/include/class.dispatcher.php(38): UrlMatcher->dispatch('3/preview', Array)\n#6 /var/www/
osticket/include/class.dispatcher.php(120): Dispatcher->resolve('3/preview', Array)\n#7 /var/www/osticket/include/class.dispatcher.php(38): UrlMatcher->dispatch(
'/queue/3/p in /var/www/osticket/include/class.orm.php on line 760, referer: https://host.xxx/scp/queues.php?id=3
[Tue Oct 08 12:33:46.413935 2019] [php7:warn] [pid 1604] [client 172.16.181.4:57847] PHP Warning: Invalid argument supplied for foreach() in /var/www/osticket/i
nclude/class.queue.php on line 2838, referer: https://host.xxxx/scp/queues.php?id=3
[Tue Oct 08 12:34:08.498416 2019] [php7:warn] [pid 1591] [client 172.16.181.4:57850] PHP Warning: count(): Parameter must be an array or an object that implemen
ts Countable in /var/www/osticket/include/class.queue.php on line 2910, referer: https://host.xxx/scp/queues.php?id=3
[Tue Oct 08 12:34:53.696848 2019] [php7:error] [pid 1600] [client 172.16.181.4:57869] PHP Fatal error: Uncaught TypeError: Argument 1 passed to AnnotatedModel::
wrap() must be an instance of VerySimpleModel, null given, called in /var/www/osticket/include/class.queue.php on line 2738 and defined in /var/www/osticket/incl
ude/class.orm.php:760\nStack trace:\n#0 /var/www/osticket/include/class.queue.php(2738): AnnotatedModel::wrap(NULL, Object(QueueColumnGlue))\n#1 /var/www/osticke
t/include/class.queue.php(2771): QueueColumnListBroker->add(NULL, Object(QueueColumnGlue))\n#2 /var/www/osticket/include/class.queue.php(1278): QueueColumnListBr
oker->updateColumns(Array, Array, Array)\n#3 /var/www/osticket/scp/queues.php(34): CustomQueue->update(Array, Array)\n#4 {main}\n thrown in /var/www/osticket/in
clude/class.orm.php on line 760, referer: https://host.xxx