diff --git a/Admin/Install/Interfaces/ListExchanger/CsvListExporter/defaultCsvExporter.csv.php b/Admin/Install/Interfaces/ListExchanger/CsvListExporter/defaultCsvExporter.csv.php
index 3fb74ec..39d7275 100644
--- a/Admin/Install/Interfaces/ListExchanger/CsvListExporter/defaultCsvExporter.csv.php
+++ b/Admin/Install/Interfaces/ListExchanger/CsvListExporter/defaultCsvExporter.csv.php
@@ -12,10 +12,19 @@
  */
 declare(strict_types=1);
 
+use Modules\Exchange\Models\NullReport;
+
 /** @var \phpOMS\Views\View $this */
-/** @var array $data */
-$report    = $this->data['report'] ?? [];
-$headlines = \array_keys(\reset($report->data));
+
+/** @var \Modules\Exchange\Models\Report $report */
+$report = $this->data['report'] ?? new NullReport();
+
+$first = \reset($report->data);
+if ($first === false) {
+    $first = [];
+}
+
+$headlines = \array_keys($first);
 
 $out = \fopen('php://output', 'w');
 if ($out !== false) {
diff --git a/Admin/Install/Interfaces/ListExchanger/ExcelListExporter/defaultExcelExporter.xls.php b/Admin/Install/Interfaces/ListExchanger/ExcelListExporter/defaultExcelExporter.xls.php
index 133a1c5..1c95e8b 100644
--- a/Admin/Install/Interfaces/ListExchanger/ExcelListExporter/defaultExcelExporter.xls.php
+++ b/Admin/Install/Interfaces/ListExchanger/ExcelListExporter/defaultExcelExporter.xls.php
@@ -12,24 +12,34 @@
  */
 declare(strict_types=1);
 
+use Modules\Exchange\Models\NullReport;
+use Modules\Media\Models\NullCollection;
 use PhpOffice\PhpSpreadsheet\IOFactory;
 use phpOMS\Utils\StringUtils;
 
 /** @var \phpOMS\Views\View $this */
 
-/** @var array<array> $data */
-$report = $this->data['report'] ?? [];
+/** @var \Modules\Exchange\Models\Report $report */
+$report = $this->data['report'] ?? new NullReport();
 
-include $this->data['defaultTemplates']->findFile('.xls.php')->getAbsolutePath();
+/** @var \Modules\Media\Models\Collection $collection */
+$collection = $this->data['defaultTemplates'] ?? new NullCollection();
+
+include $collection->findFile('.xls.php')->getAbsolutePath();
 
 $spreadsheet = new DefaultExcel();
 
-$headlines = \array_keys(\reset($report->data));
+$first = \reset($report->data);
+if ($first === false) {
+    $first = [];
+}
+
+$headlines = \array_keys($first);
 foreach ($headlines as $j => $headline) {
     $spreadsheet->getActiveSheet()->setCellValue(StringUtils::intToAlphabet($j + 1) . 1, $headline);
 }
 
-foreach ($data as $i => $row) {
+foreach ($report->data as $i => $row) {
     foreach ($row as $j => $cell) {
         $spreadsheet->getActiveSheet()->setCellValue(StringUtils::intToAlphabet($j + 1) . ($i + 2), $cell);
     }
diff --git a/Admin/Install/Interfaces/ListExchanger/PdfListExporter/defaultPdfListExporter.pdf.php b/Admin/Install/Interfaces/ListExchanger/PdfListExporter/defaultPdfListExporter.pdf.php
index b754ecb..dfbf7c4 100644
--- a/Admin/Install/Interfaces/ListExchanger/PdfListExporter/defaultPdfListExporter.pdf.php
+++ b/Admin/Install/Interfaces/ListExchanger/PdfListExporter/defaultPdfListExporter.pdf.php
@@ -12,12 +12,18 @@
  */
 declare(strict_types=1);
 
+use Modules\Exchange\Models\NullReport;
+use Modules\Media\Models\NullCollection;
+
 /** @var \phpOMS\Views\View $this */
 
-/** @var array<array> $data */
-$report = $this->data['report'] ?? [];
+/** @var \Modules\Exchange\Models\Report $report */
+$report = $this->data['report'] ?? new NullReport();
 
-require_once $this->data['defaultTemplates']->findFile('.pdf.php')->getAbsolutePath();
+/** @var \Modules\Media\Models\Collection $collection */
+$collection = $this->data['defaultTemplates'] ?? new NullCollection();
+
+require_once $collection->findFile('.pdf.php')->getAbsolutePath();
 
 /** @phpstan-import-type DefaultPdf from ../../../../Admin/Install/Media/PdfDefaultTemplate/pdfTemplate.pdf.php */
 $pdf = new DefaultPdf();
@@ -27,7 +33,12 @@ $topPos = $pdf->getY();
 $tbl = '<table border="1" cellpadding="0" cellspacing="0">';
 
 // headline
-$headlines = \array_keys(\reset($report->data));
+$first = \reset($report->data);
+if ($first === false) {
+    $first = [];
+}
+
+$headlines = \array_keys($first);
 $tbl .= '<thead><tr>';
 foreach ($headlines as $headline) {
     $tbl .= '<th>' . $headline . '</th>';
diff --git a/Models/NullReport.php b/Models/NullReport.php
new file mode 100644
index 0000000..54e8872
--- /dev/null
+++ b/Models/NullReport.php
@@ -0,0 +1,27 @@
+<?php
+/**
+ * Jingga
+ *
+ * PHP Version 8.1
+ *
+ * @package   Modules\Exchange\Models
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 2.0
+ * @version   1.0.0
+ * @link      https://jingga.app
+ */
+declare(strict_types=1);
+
+namespace Modules\Exchange\Models;
+
+/**
+ * Null model.
+ *
+ * @package Modules\Exchange\Models
+ * @license OMS License 2.0
+ * @link    https://jingga.app
+ * @since   1.0.0
+ */
+final class NullReport extends Report
+{
+}