diff --git a/Classes/Common/IiifManifest.php b/Classes/Common/IiifManifest.php
index 22679363..b86ecbb8 100644
--- a/Classes/Common/IiifManifest.php
+++ b/Classes/Common/IiifManifest.php
@@ -800,9 +800,9 @@ final class IiifManifest extends Document
             $this->_getPhysicalStructure();
             // ... and extension configuration.
             $extConf = unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf'][self::$extKey]);
-            $fileGrpFulltexts = GeneralUtility::trimExplode(',', $extConf['fileGrpDownload']);
+            $fileGrpsFulltext = GeneralUtility::trimExplode(',', $extConf['fileGrpFulltext']);
             if (!empty($this->physicalStructureInfo[$id])) {
-                while ($fileGrpFulltext = array_shift($fileGrpFulltexts)) {
+                while ($fileGrpFulltext = array_shift($fileGrpsFulltext)) {
                     if (!empty($this->physicalStructureInfo[$id]['files'][$fileGrpFulltext])) {
                         $rawText = parent::getRawTextFromXml($id);
                         break;
diff --git a/Classes/Plugin/PageGrid.php b/Classes/Plugin/PageGrid.php
index 7e2eebd9..a8e8c390 100644
--- a/Classes/Plugin/PageGrid.php
+++ b/Classes/Plugin/PageGrid.php
@@ -54,9 +54,9 @@ class PageGrid extends \Kitodo\Dlf\Common\AbstractPlugin
         // Set pagination.
         $markerArray['###PAGINATION###'] = htmlspecialchars($this->doc->physicalStructureInfo[$this->doc->physicalStructure[$number]]['orderlabel']);
         // Get thumbnail or placeholder.
-        $fileGrpThumbs = GeneralUtility::trimExplode(',', $this->onf['fileGrpThumbs']);
-        if (array_intersect($fileGrpThumbs, array_keys($this->doc->physicalStructureInfo[$this->doc->physicalStructure[$number]]['files'])) !== [] ) {
-            while ($fileGrpThumb = array_shift($fileGrpThumbs)) {
+        $fileGrpsThumb = GeneralUtility::trimExplode(',', $this->conf['fileGrpThumbs']);
+        if (array_intersect($fileGrpsThumb, array_keys($this->doc->physicalStructureInfo[$this->doc->physicalStructure[$number]]['files'])) !== [] ) {
+            while ($fileGrpThumb = array_shift($fileGrpsThumb)) {
                 if (!empty($this->doc->physicalStructureInfo[$this->doc->physicalStructure[$number]]['files'][$fileGrpThumb])) {
                     $thumbnailFile = $this->doc->getFileLocation($this->doc->physicalStructureInfo[$this->doc->physicalStructure[$number]]['files'][$fileGrpThumb]);
                     break;