Getting "Return value of Nuwave\Lighthouse\Execution\BaseRequest::query() must be of the type string, null returned" on "/graphql" endpoint.

[IamSwap]

First of all, thank you for making this great package.

I am using the latest version of the lighthouse. It was working fine until yesterday. But now, I am getting Return value of Nuwave\Lighthouse\Execution\BaseRequest::query() must be of the type string, null returned on /graphql endpoint.

I tried making fresh Laravel project & installed the package but had no luck. Also tried on a different machine with fresh Laravel project.

Output/Logs

Click to expand

Symfony\Component\Debug\Exception\FatalThrowableError thrown with message "Return value of Nuwave\Lighthouse\Execution\BaseRequest::query() must be of the type string, null returned"

Stacktrace:
#37 Symfony\Component\Debug\Exception\FatalThrowableError in /Volumes/Work/Sites/lara/vendor/nuwave/lighthouse/src/Execution/BaseRequest.php:50
#36 Nuwave\Lighthouse\Execution\BaseRequest:query in /Volumes/Work/Sites/lara/vendor/nuwave/lighthouse/src/GraphQL.php:124
#35 Nuwave\Lighthouse\GraphQL:executeRequest in /Volumes/Work/Sites/lara/vendor/nuwave/lighthouse/src/Support/Http/Controllers/GraphQLController.php:85
#34 Nuwave\Lighthouse\Support\Http\Controllers\GraphQLController:executeBatched in /Volumes/Work/Sites/lara/vendor/nuwave/lighthouse/src/Support/Http/Controllers/GraphQLController.php:69
#33 Nuwave\Lighthouse\Support\Http\Controllers\GraphQLController:query in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
#32 call_user_func_array in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
#31 Illuminate\Routing\Controller:callAction in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
#30 Illuminate\Routing\ControllerDispatcher:dispatch in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Route.php:219
#29 Illuminate\Routing\Route:runController in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Route.php:176
#28 Illuminate\Routing\Route:run in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Router.php:680
#27 Illuminate\Routing\Router:Illuminate\Routing\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php:30
#26 Illuminate\Routing\Pipeline:Illuminate\Routing\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:104
#25 Illuminate\Pipeline\Pipeline:then in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Router.php:682
#24 Illuminate\Routing\Router:runRouteWithinStack in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Router.php:657
#23 Illuminate\Routing\Router:runRoute in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Router.php:623
#22 Illuminate\Routing\Router:dispatchToRoute in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Router.php:612
#21 Illuminate\Routing\Router:dispatch in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:176
#20 Illuminate\Foundation\Http\Kernel:Illuminate\Foundation\Http\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php:30
#19 Illuminate\Routing\Pipeline:Illuminate\Routing\{closure} in /Volumes/Work/Sites/lara/vendor/fideloper/proxy/src/TrustProxies.php:57
#18 Fideloper\Proxy\TrustProxies:handle in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:163
#17 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php:53
#16 Illuminate\Routing\Pipeline:Illuminate\Routing\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php:21
#15 Illuminate\Foundation\Http\Middleware\TransformsRequest:handle in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:163
#14 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php:53
#13 Illuminate\Routing\Pipeline:Illuminate\Routing\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php:21
#12 Illuminate\Foundation\Http\Middleware\TransformsRequest:handle in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:163
#11 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php:53
#10 Illuminate\Routing\Pipeline:Illuminate\Routing\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php:27
#9 Illuminate\Foundation\Http\Middleware\ValidatePostSize:handle in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:163
#8 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php:53
#7 Illuminate\Routing\Pipeline:Illuminate\Routing\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/CheckForMaintenanceMode.php:62
#6 Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode:handle in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:163
#5 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php:53
#4 Illuminate\Routing\Pipeline:Illuminate\Routing\{closure} in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:104
#3 Illuminate\Pipeline\Pipeline:then in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:151
#2 Illuminate\Foundation\Http\Kernel:sendRequestThroughRouter in /Volumes/Work/Sites/lara/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:116
#1 Illuminate\Foundation\Http\Kernel:handle in /Volumes/Work/Sites/lara/public/index.php:55
#0 require in /Users/swapnil/.composer/vendor/laravel/valet/server.php:158

Environment

Lighthouse Version: 3.2.1
Laravel Version: 5.7
PHP Version: 7.2

[spawnia]

You are most probably sending an empty query.

The error message is cryptic though, this is why we created #669

[adaosantos]

I have the some problem, I follow the tutorial on site and see this message.
Apparently the GraphQL controller don't receive the post params

[jasbirsmindfiresolutions]

http://myapi/graphql?query={users{name}}