Issue #3358177 by farid.muborakshoev, BramDriesen: json_decode() failed when...

Issue #3358177 by farid.muborakshoev, BramDriesen: json_decode() failed when handling invalid JSON response

src/Collector.php

@@ -77,7 +77,13 @@ class Collector implements CollectorInterface {
       }
       else {
         $json = $response->getBody()->getContents();
+        $json = preg_replace( '/[\x{200B}-\x{200D}\x{FEFF}]/u', '', $json );
         $values = json_decode($json, TRUE);
+        if (is_null($values)) {
+          $msg = json_last_error_msg();
+          $this->logger->error("JSON cannot be decoded: $msg");
+          return;
+        }
 
         $storage = $this->entityTypeManager->getStorage('client_site');