Fatal error: Uncaught Error: Call to a member function next() on array in /home/cmqjoiax/public_html/plugins/generic/scholarlyIndexingOptimizer/classes/ScholarlyMetadataInjector.inc.php:174 Stack trace: #0 /home/cmqjoiax/public_html/plugins/generic/scholarlyIndexingOptimizer/classes/ScholarlyMetadataInjector.inc.php(57): ScholarlyMetadataInjector->_resolveData() #1 /home/cmqjoiax/public_html/plugins/generic/scholarlyIndexingOptimizer/ScholarlyIndexingOptimizerPlugin.inc.php(157): ScholarlyMetadataInjector->buildCitationMetaTags() #2 /home/cmqjoiax/public_html/lib/pkp/classes/plugins/HookRegistry.inc.php(107): ScholarlyIndexingOptimizerPlugin->injectCitationMetaTags() #3 /home/cmqjoiax/public_html/pages/article/ArticleHandler.inc.php(319): HookRegistry::call() #4 /home/cmqjoiax/public_html/lib/pkp/classes/core/PKPRouter.inc.php(397): ArticleHandler->view() #5 /home/cmqjoiax/public_html/lib/pkp/classes/core/PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest() #6 /home/cmqjoiax/public_html/lib/pkp/classes/core/Dispatcher.inc.php(144): PKPPageRouter->route() #7 /home/cmqjoiax/public_html/lib/pkp/classes/core/PKPApplication.inc.php(360): Dispatcher->dispatch() #8 /home/cmqjoiax/public_html/index.php(68): PKPApplication->execute() #9 {main} thrown in /home/cmqjoiax/public_html/plugins/generic/scholarlyIndexingOptimizer/classes/ScholarlyMetadataInjector.inc.php on line 174