Fatal error: Uncaught TypeError: Argument 1 passed to Sokil\IsoCodes\Database\Countries::getByAlpha2() must be of the type string, null given, called in /htdocs/home/revistaterceiramargem.com/www/pages/search/SearchHandler.inc.php on line 272 and defined in /htdocs/home/revistaterceiramargem.com/www/lib/pkp/lib/vendor/sokil/php-isocodes/src/Database/Countries.php:42
Stack trace:
#0 /htdocs/home/revistaterceiramargem.com/www/pages/search/SearchHandler.inc.php(272): Sokil\IsoCodes\Database\Countries->getByAlpha2(NULL)
#1 /htdocs/home/revistaterceiramargem.com/www/lib/pkp/classes/core/PKPRouter.inc.php(391): SearchHandler->authors(Array, Object(Request))
#2 /htdocs/home/revistaterceiramargem.com/www/lib/pkp/classes/core/PKPPageRouter.inc.php(231): PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(Request), Array, false)
#3 /htdocs/home/revistaterceiramargem.com/www/lib/pkp/classes/core/Dispatcher.inc.php(143): PKPPageRouter->route(Object(Request))
#4 /htdocs/home/revistaterceiramargem.com/www/lib/pkp/classes/core/P in /htdocs/home/revistaterceiramargem.com/www/lib/pkp/lib/vendor/sokil/php-isocodes/src/Database/Countries.php on line 42