Sprout forms AJAX submission giving Template not found I am able to capture submissions from a regular HTML form, however if I replicate the POST with JSON I get the following "Template not found" error.

Template not found: sprout-forms/entries/save-entry
1. in /var/www/Applications/vendor/craftcms/cms/src/controllers/TemplatesController.php
at line 70 61626364656667686970717273747576777879
  * @param string $template
  * @param array $variables
  * @return Response
  * @throws NotFoundHttpException if the requested template cannot be found
  */
 public function actionRender(string $template, array $variables = []): Response
 {
     // Does that template exist?
     if (!$this-&gt;getView()-&gt;doesTemplateExist($template)) {
         throw new NotFoundHttpException('Template not found: ' . $template);
     }

     // Merge any additional route params
     $routeParams = Craft::$app-&gt;getUrlManager()-&gt;getRouteParams();
     unset($routeParams['template'], $routeParams['template']);
     $variables = array_merge($variables, $routeParams);

     return $this-&gt;renderTemplate($template, $variables);
 }

2. craft\controllers\TemplatesController::actionRender('sprout-forms/entries/save-entry', [])

....

11. in /var/www/Applications/web/index.php at line 21 – yii\base\Application::run() 15161718192021
                     (new Dotenv\Dotenv(CRAFT_BASE_PATH))-&gt;load(); }   // Load and run Craft define('CRAFT_ENVIRONMENT',
getenv('ENVIRONMENT') ?: 'production'); $app = require
CRAFT_VENDOR_PATH.'/craftcms/cms/bootstrap/web.php'; $app-&gt;run();


I have disabled CSRF for now in the hope of taking that out of the equation.

I believe I have replicated the HTML form request with a JSON POST using Postman but am hitting a dead-end. Any assistance with debug steps, or a sample Postman config to a working solution would be hugely appreciated.
If you're using template overrides, could you please make sure that the next line is in the &lt;form&gt; ... &lt;\form&gt; tag?

{% hook 'sproutForms.modifyForm' %}

This line is required in Sprout Forms for Craft3 if you have the spam protection enabled in the plugin settings.