Warning: fopen(/var/www/minilib/files/usageStats/usageEventLogs/usage_events_20250427.log): Failed to open stream: Permission denied in /var/www/minilib/lib/pkp/classes/observers/listeners/LogUsageEvent.php on line 103

Fatal error: Uncaught TypeError: flock(): Argument #1 ($stream) must be of type resource, bool given in /var/www/minilib/lib/pkp/classes/observers/listeners/LogUsageEvent.php:104 Stack trace: #0 /var/www/minilib/lib/pkp/classes/observers/listeners/LogUsageEvent.php(104): flock() #1 /var/www/minilib/lib/pkp/classes/observers/listeners/LogUsageEvent.php(54): PKP\observers\listeners\LogUsageEvent->logUsageEvent() #2 /var/www/minilib/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(441): PKP\observers\listeners\LogUsageEvent->handle() #3 /var/www/minilib/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(249): Illuminate\Events\Dispatcher->Illuminate\Events\{closure}() #4 /var/www/minilib/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Foundation/helpers.php(451): Illuminate\Events\Dispatcher->dispatch() #5 /var/www/minilib/pages/article/ArticleHandler.php(502): event() #6 [internal function]: APP\pages\article\ArticleHandler->download() #7 /var/www/minilib/lib/pkp/classes/core/PKPRouter.php(334): call_user_func() #8 /var/www/minilib/lib/pkp/classes/core/PKPPageRouter.php(277): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest() #9 /var/www/minilib/lib/pkp/classes/core/Dispatcher.php(165): PKP\core\PKPPageRouter->route() #10 /var/www/minilib/lib/pkp/classes/core/PKPApplication.php(388): PKP\core\Dispatcher->dispatch() #11 /var/www/minilib/index.php(21): PKP\core\PKPApplication->execute() #12 {main} thrown in /var/www/minilib/lib/pkp/classes/observers/listeners/LogUsageEvent.php on line 104