Fatal error: Uncaught Error: Non-static method Autor::getStammAutors() cannot be called statically in /usr/www/users/schultad/www_toplife/classes/front/AutorListPage.php:18 Stack trace: #0 /usr/www/users/schultad/www_toplife/classes/front/PageComposer.php(181): AutorListPage->renderForScreen() #1 /usr/www/users/schultad/www_toplife/classes/front/PageComposer.php(132): PageComposer->screenOutput() #2 /usr/www/users/schultad/www_toplife/index.php(78): PageComposer->compose() #3 {main} thrown in /usr/www/users/schultad/www_toplife/classes/front/AutorListPage.php on line 18