Fatal error: Uncaught Twig\Error\RuntimeError: The "filter" filter expects an array or "Traversable", got "NULL". in /var/www/app/views/search.html.twig:4 Stack trace: #0 /var/www/app/vendor/twig/twig/src/Environment.php(497) : eval()'d code(38): twig_array_filter(Object(Twig\Environment), NULL, Object(Closure)) #1 /var/www/app/vendor/twig/twig/src/Template.php(453): __TwigTemplate_e6884fe0474f6b82e282b5712fbf718df54eaa552cc7d68e08eeae757df6a86a->doDisplay(Array, Array) #2 /var/www/app/vendor/twig/twig/src/Template.php(420): Twig\Template->displayWithErrorHandling(Array, Array) #3 /var/www/app/vendor/twig/twig/src/Environment.php(497) : eval()'d code(135): Twig\Template->display(Array) #4 /var/www/app/vendor/twig/twig/src/Template.php(453): __TwigTemplate_80e8a950d08f9efb69bcf0f20736b90d6802d2929837f547a10a4dff0227ade4->doDisplay(Array, Array) #5 /var/www/app/vendor/twig/twig/src/Template.php(420): Twig\Template->displayWithErrorHandling(Array, Array) #6 /var/www/app/vendor/twig/twig/src/Environment.php(497) : eval()'d co in /var/www/app/views/search.html.twig on line 4