FIX #19031 TIME 0:15 Fixed warnings when you want to download a complete folder

src/app/history/controllers/HistoryController.php

@@ -552,7 +552,7 @@ class HistoryController
         if (!empty($content['errors'])) {
             return $response->withStatus(400)->withJson(['errors' => $content['errors']]);
         }
-        $content  = $content['fileContent'];
+        $content  = $content['fileContent'] ?? null;
         $format   = 'zip';
         $mimeType = 'application/zip';
 
@@ -568,7 +568,7 @@ class HistoryController
         if (empty($queryParams['mode']) || $queryParams['mode'] == 'base64') {
             return $response->withJson(['encodedProofDocument' => base64_encode($content), 'format' => $format]);
         } else {
-            $response->write($content);
+            $response->write($content ?? '');
             $response = $response->withAddedHeader('Content-Disposition', "inline; filename=maarch_history_proof." . $format);
             return $response->withHeader('Content-Type', $mimeType);
         }
@@ -581,6 +581,8 @@ class HistoryController
         $tmpPath     = CoreConfigModel::getTmpPath();
         $zipFilename = $tmpPath . 'archivedProof' . $GLOBALS['id'] . '_' . rand() . '.zip';
 
+        if (empty($zipFilename)) 
+ 
         if ($zip->open($zipFilename, \ZipArchive::CREATE) === true) {
             foreach ($aArgs['documents'] as $document) {
                 if(file_exists($document['path']) && filesize($document['path']) > 0) {