Fix HTTP headers

app/Exceptions/Handler.php

@@ -62,7 +62,7 @@ class Handler extends ExceptionHandler
         if ($e instanceof ValidationException) {
             // Quick fix for returning 422
             // @see https://prinzeugen.net/custom-responses-of-laravel-validations/
-            if ($request->expectsJson() || $request->ajax()) {
+            if ($request->expectsJson()) {
                 return response()->json([
                     'errno' => 1,
                     'msg' => $e->validator->errors()->first()

resources/assets/src/js/net.js

@@ -5,6 +5,7 @@ const empty = Object.create(null);
 const init = {
     credentials: 'same-origin',
     headers: {
+        'Accept': 'application/json',
         'Content-Type': 'application/json'
     }
 };