Fatal error: Uncaught TypeError: PKP\orcid\OrcidManager::getApiType(): Return value must be of type string, null returned in /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/classes/orcid/OrcidManager.php:373 Stack trace: #0 /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/classes/orcid/OrcidManager.php(115): PKP\orcid\OrcidManager::getApiType(Object(APP\journal\Journal)) #1 /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/classes/user/form/RegistrationForm.php(139): PKP\orcid\OrcidManager::getOrcidUrl() #2 /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/classes/form/Form.php(156): PKP\user\form\RegistrationForm->fetch(Object(APP\core\Request), NULL, true) #3 /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/pages/user/RegistrationHandler.php(66): PKP\form\Form->display(Object(APP\core\Request)) #4 [internal function]: PKP\pages\user\RegistrationHandler->register(Array, Object(APP\core\Request)) #5 /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/classes/core/PKPRouter.php(327): call_user_func(Array, Array, Object(APP\core\Request)) #6 /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/classes/core/PKPPageRouter.php(249): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(APP\core\Request), Array, false) #7 /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/classes/core/Dispatcher.php(157): PKP\core\PKPPageRouter->route(Object(APP\core\Request)) #8 /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/classes/core/PKPApplication.php(426): PKP\core\Dispatcher->dispatch(Object(APP\core\Request)) #9 /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/index.php(39): PKP\core\PKPApplication->execute() #10 {main} thrown in /home/k777unoozuedu/public_html/kunscij.kunoozu.edu.iq/lib/pkp/classes/orcid/OrcidManager.php on line 373