502 Gateway Timeout issue when browsing to /users/statistics

[acm5708]

When trying to browse to /users/statistics MISP appears to fail and throw a 502 Gateway timeout error. All timeouts and max execution time values have been increased along with the services restarted and no change has occurred. According to my error.log file it appears to be PHP related (see error below):

2023-09-08 15:33:08 Warning: Warning (2): array_key_exists() expects parameter 2 to be array, null given in [/var/www/MISP/app/View/Elements/genericElements/Form/Fields/pullRulesField.ctp, line 13]
Trace:
ErrorHandler::handleError() - APP/Lib/cakephp/lib/Cake/Error/ErrorHandler.php, line 230
include - APP/View/Elements/genericElements/Form/Fields/pullRulesField.ctp, line 13
View::_evaluate() - APP/Lib/cakephp/lib/Cake/View/View.php, line 971
View::_render() - APP/Lib/cakephp/lib/Cake/View/View.php, line 933
View::_renderElement() - APP/Lib/cakephp/lib/Cake/View/View.php, line 1224
View::element() - APP/Lib/cakephp/lib/Cake/View/View.php, line 418
include - APP/View/Elements/genericElements/Form/fieldScaffold.ctp, line 68
View::_evaluate() - APP/Lib/cakephp/lib/Cake/View/View.php, line 971
View::_render() - APP/Lib/cakephp/lib/Cake/View/View.php, line 933
View::_renderElement() - APP/Lib/cakephp/lib/Cake/View/View.php, line 1224
View::element() - APP/Lib/cakephp/lib/Cake/View/View.php, line 418
include - APP/View/Elements/genericElements/Form/genericForm.ctp, line 59
View::_evaluate() - APP/Lib/cakephp/lib/Cake/View/View.php, line 971
View::_render() - APP/Lib/cakephp/lib/Cake/View/View.php, line 933
View::_renderElement() - APP/Lib/cakephp/lib/Cake/View/View.php, line 1224
View::element() - APP/Lib/cakephp/lib/Cake/View/View.php, line 418
include - APP/View/Feeds/add.ctp, line 175
View::_evaluate() - APP/Lib/cakephp/lib/Cake/View/View.php, line 971
View::_render() - APP/Lib/cakephp/lib/Cake/View/View.php, line 933
View::render() - APP/Lib/cakephp/lib/Cake/View/View.php, line 473
Controller::render() - APP/Lib/cakephp/lib/Cake/Controller/Controller.php, line 968
FeedsController::edit() - APP/Controller/FeedsController.php, line 476
ReflectionMethod::invokeArgs() - [internal], line ??
Controller::invokeAction() - APP/Lib/cakephp/lib/Cake/Controller/Controller.php, line 499
Dispatcher::_invoke() - APP/Lib/cakephp/lib/Cake/Routing/Dispatcher.php, line 193
Dispatcher::dispatch() - APP/Lib/cakephp/lib/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 99

Following the error info, within pullRulesField.ctp the "$pullRules" variable is returning NULL instead of data.

I am out of ideas. Anyone have any thoughts?