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Fatal error: Uncaught Error: Call to a member function getAuthor() on null in /var/www/html/tt-api/controllers/WidgetController.php:545 Stack trace: #0 /var/www/html/tt-api/controllers/WidgetController.php(995): WidgetController->getWidgetForCitationData() #1 /var/www/html/tt-api/lib/HomegrownMVC/HomegrownMVC/Controller/WildcardController.php(91): WidgetController->{closure}() #2 /var/www/html/tt-api/lib/HomegrownMVC/HomegrownMVC/Controller/BaseController.php(69): HomegrownMVC\Controller\WildcardController->HomegrownMVC\Controller\{closure}() #3 /var/www/html/tt-api/lib/HomegrownMVC/HomegrownMVC/Controller/WildcardController.php(44): HomegrownMVC\Controller\BaseController->invokeRoute() #4 /var/www/html/tt-api/lib/HomegrownMVC/HomegrownMVC/Router.php(178): HomegrownMVC\Controller\WildcardController->invokeRoute() #5 /var/www/html/tt-api/lib/HomegrownMVC/HomegrownMVC/Router.php(138): HomegrownMVC\Router->findRoute() #6 /var/www/html/tt-api/lib/HomegrownMVC/HomegrownMVC/Router.php(124): HomegrownMVC\Router->forceFindRoute() in /var/www/html/tt-api/controllers/WidgetController.php on line 545