Fatal error: Uncaught Symfony\Component\Debug\Exception\FatalThrowableError: Call to a member function jsonSerialize() on null in /app/ezplatform/vendor/ocramius/proxy-manager/src/ProxyManager/GeneratorStrategy/EvaluatingGeneratorStrategy.php(70) : eval()'d code:72 Stack trace: #0 [internal function]: ProxyManagerGeneratedProxy\__PM__\EzSystems\EzPlatformAdminUi\UI\Config\ConfigWrapper\Generated89a3c2e40e24ac0f40bc043e24ec8ed2->jsonSerialize() #1 /app/ezplatform/var/cache/prod/twig/d0/d08328dbff4e6d6f3b85b531c38139de4ecf14abc4b3fd93d23f3a8048446f33.php(118): json_encode(Object(ProxyManagerGeneratedProxy\__PM__\EzSystems\EzPlatformAdminUi\UI\Config\ConfigWrapper\Generated89a3c2e40e24ac0f40bc043e24ec8ed2)) #2 /app/ezplatform/vendor/twig/twig/src/Template.php(405): __TwigTemplate_d65a643dc670097e54d87884d47d5e0f84550bb8a27d2c222b0f8d546d4e07da->doDisplay(Array, Array) #3 /app/ezplatform/vendor/twig/twig/src/Template.php(378): Twig\Template->displayWithErrorHandling(Array, Array) #4 /app/ezplatform/var/cache/prod/twig/62/626e in /app/ezplatform/vendor/ocramius/proxy-manager/src/ProxyManager/GeneratorStrategy/EvaluatingGeneratorStrategy.php(70) : eval()'d code on line 72