[BUGFIX] fix page not found logic for unsolicited applications

Classes/Controller/JoblistController.php

@@ -367,6 +367,7 @@ class JoblistController extends ActionController {
 	 * @return ResponseInterface
 	 * @throws AspectNotFoundException
 	 * @throws SiteNotFoundException
+	 * @throws ImmediateResponseException
 	 * @throws PageNotFoundException
 	 */
 	public function applyFormAction(
@@ -381,10 +382,21 @@ class JoblistController extends ActionController {
 
 		// Check if this page is explicitly configured as an unsolicited application page.
 		if (($this->settings['isUnsolicitedApplicationPage'] ?? FALSE) && $jobId !== NULL) {
+			/** @var PageRenderer $pageRenderer */
+			$pageRenderer = GeneralUtility::makeInstance(PageRenderer::class);
+			// the PageRenderer contains the content of the current request, the result of the following sub-request will
+			// be appended to it, and we get 2 pages, the current one and the 404-page in one. We flush the PageRenderer
+			// content here, so it will contain only the 404-page content
+			$pageRenderer->setBodyContent('');
 			// For unsolicited pages, a job parameter is not allowed
-			throw new \TYPO3\CMS\Core\Error\Http\PageNotFoundException(
-				'Job parameter is not allowed on an unsolicited application page.'
+			$response = GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(
+				$GLOBALS['TYPO3_REQUEST'],
+				'Job parameter is not allowed on an unsolicited application page.',
+				['code' => PageAccessFailureReasons::PAGE_NOT_FOUND]
 			);
+
+
+			throw new ImmediateResponseException($response, 1741779370);
 		}
 
 		// For regular application pages, if the disallow unsolicited setting is explicitly enabled and no job