Fatal error: Uncaught InvalidArgumentException: JsonMapper::map() requires first argument to be an object, NULL given. in /www/vendor/netresearch/jsonmapper/src/JsonMapper.php:126 Stack trace: #0 /www/src/RequestParser.php(49): JsonMapper->map(NULL, Object(Grillbot\Mattermost\IncomingMessage)) #1 /www/app/config.php(24): Grillbot\RequestParser->parse() #2 [internal function]: DI\Definition\Source\DefinitionFile->{closure}(Object(Grillbot\RequestParser)) #3 /www/vendor/php-di/invoker/src/Invoker.php(82): call_user_func_array(Object(Closure), Array) #4 /www/vendor/php-di/php-di/src/DI/Definition/Resolver/FactoryResolver.php(81): Invoker\Invoker->call(Object(Closure), Array) #5 /www/vendor/php-di/php-di/src/DI/Definition/Resolver/ResolverDispatcher.php(58): DI\Definition\Resolver\FactoryResolver->resolve(Object(DI\Definition\FactoryDefinition), Array) #6 /www/vendor/php-di/php-di/src/DI/Container.php(286): DI\Definition\Resolver\ResolverDispatcher->resolve(Object(DI\Definition\FactoryDefinition), Array) #7 /www/vendor/php-di in /www/vendor/netresearch/jsonmapper/src/JsonMapper.php on line 126