[BUGFIX] Fix failed indexing logging

If event AfterCacheableContentIsGeneratedEvent is not dispatched
the indexing failed silently, this is fixed with #3735 but
the logging is faulty and doesn't consider the indexing status.
This commit fixes the logging, by checking the state in response
data array.

Relates: #3735

Classes/IndexQueue/FrontendHelper/PageIndexer.php

@@ -390,15 +390,15 @@ public function deactivate(PageIndexerResponse $response): void
         if ($this->activated) {
             if (!isset($this->responseData['pageIndexed'])) {
                 $this->responseData['pageIndexed'] = false;
-            }
-            $response->addActionResult($this->action, $this->responseData);
 
-            $this->setupConfiguration();
-            if ($this->configuration->getLoggingExceptions()) {
-                $this->logger->error(
-                    'Unknown exception while trying to index page',
-                );
+                $this->setupConfiguration();
+                if ($this->configuration->getLoggingExceptions()) {
+                    $this->logger->error(
+                        'Unknown exception while trying to index page',
+                    );
+                }
             }
+            $response->addActionResult($this->action, $this->responseData);
         }
         $this->activated = false;
     }