Apache not return Laravel json validation errors on Test but works on Dev

I've been working on a Laravel API with validation. I'm sending this request to the server:

> POST /api/v1/clients HTTP/1.1
> Host: localhost
> User-Agent: insomnia/2022.3.0
> Content-Type: application/json
> Accept: application/json
> Authorization: Bearer ***************
> Content-Length: 16

{
 "name": "",
}

On my development system, running windows/Apache/PHP 8.1, the POST requests return a JSON object containing validation errors.

{
    "message": "The name field is required.",
    "errors": {
        "name": [
            "The name field is required."
        ]
    }
}

But my test system, running Linux/Apache/PHP 8.1, does not return a JSON response:

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>422 Unprocessable Content</title>
</head><body>
<h1>Unprocessable Content</h1>
<p>The server understands the media type of the
request entity, but was unable to process the
contained instructions.</p>
</body></html>

Here is my code:

api.php

Route::group(['middleware' => 'auth:sanctum', 'prefix' => 'v1'], function () {
    Route::apiResource('clients', ClientApiController::class);
});

StoreClientRequest.php

public function rules()
{
    return [
        'name' => 'required|string|max:255',
    ];
}

ClientAPIController.php

public function store(StoreClientRequest $request)
{
    $client = Client::create($request->all())->fresh();

    return (new ClientResource($client))->response()->setStatusCode(201);
}

Since it's working on my localhost I don't believe it is the code. I'm guessing it's an issue with Apache or PHP configuration on the Test server but I'm not seeing anything different as far as I can tell. As one is Windows and the other Linux, it's not straight forward to check the differences.

Any reason I'm not getting a JSON response back from the test server?

Solution

It does appear to be an issue with Apache dropping the body of the response when using php-fpm. I tested a couple of different configurations of Apache, Nginx, mod-php, and php-fpm.

Server	PHP	Response body
Apache	mod-php	Included
Apache	php-fpm	Missing
Nginx	php-fpm	Included

I found a few links with an issue with the request body being drop so may be the same thing or something similar.

https://www.jeffgeerling.com/blog/2017/apache-fastcgi-proxyfcgi-and-empty-post-bodies-chunked-transfer

Looks like I will need to upgrade the other apps to PHP 8 so I can switch back to mod-php or move to nginx. Thanks for the help everyone.