Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, int given in /home/ajpssior/public_html/lib/pkp/classes/statistics/PKPStatisticsHelper.php:214 Stack trace: #0 /home/ajpssior/public_html/lib/pkp/classes/statistics/PKPStatisticsHelper.php(214): array_key_exists('9385508a7320002...', 1) #1 /home/ajpssior/public_html/lib/pkp/classes/statistics/PKPStatisticsHelper.php(171): PKP\statistics\PKPStatisticsHelper->getLocation('3.23.61.129', '9385508a7320002...', false) #2 /home/ajpssior/public_html/lib/pkp/classes/observers/listeners/LogUsageEvent.php(139): PKP\statistics\PKPStatisticsHelper->getGeoData(Object(PKP\site\Site), Object(APP\journal\Journal), '3.23.61.129', '9385508a7320002...', false) #3 /home/ajpssior/public_html/lib/pkp/classes/observers/listeners/LogUsageEvent.php(53): PKP\observers\listeners\LogUsageEvent->prepareUsageEvent(Object(APP\observers\events\UsageEvent)) #4 /home/ajpssior/public_html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(441): PKP\observers\listeners\LogUsageEvent->handle(Object(APP\observers\events\UsageEvent)) #5 /home/ajpssior/public_html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(249): Illuminate\Events\Dispatcher->Illuminate\Events\{closure}('APP\\observers\\e...', Array) #6 /home/ajpssior/public_html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Foundation/helpers.php(451): Illuminate\Events\Dispatcher->dispatch('APP\\observers\\e...') #7 /home/ajpssior/public_html/pages/article/ArticleHandler.php(502): event(Object(APP\observers\events\UsageEvent)) #8 [internal function]: APP\pages\article\ArticleHandler->download(Array, Object(APP\core\Request)) #9 /home/ajpssior/public_html/lib/pkp/classes/core/PKPRouter.php(334): call_user_func(Array, Array, Object(APP\core\Request)) #10 /home/ajpssior/public_html/lib/pkp/classes/core/PKPPageRouter.php(278): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(APP\core\Request), Array, false) #11 /home/ajpssior/public_html/lib/pkp/classes/core/Dispatcher.php(165): PKP\core\PKPPageRouter->route(Object(APP\core\Request)) #12 /home/ajpssior/public_html/lib/pkp/classes/core/PKPApplication.php(395): PKP\core\Dispatcher->dispatch(Object(APP\core\Request)) #13 /home/ajpssior/public_html/index.php(21): PKP\core\PKPApplication->execute() #14 {main} thrown in /home/ajpssior/public_html/lib/pkp/classes/statistics/PKPStatisticsHelper.php on line 214