diff --git a/Models/Media.php b/Models/Media.php
index 86c5ef3..400f929 100755
--- a/Models/Media.php
+++ b/Models/Media.php
@@ -312,6 +312,11 @@ class Media implements \JsonSerializable
         return $this->isAbsolute ? $this->path : \ltrim($this->path, '\\/');
     }
 
+    public function getAbsolutePath() : string
+    {
+        return $this->isAbsolute ? $this->path : __DIR__ . '/../../../' . \ltrim($this->path, '\\/');
+    }
+
     /**
      * @return string
      *
diff --git a/Models/UploadFile.php b/Models/UploadFile.php
index 8f193a7..86ac5af 100755
--- a/Models/UploadFile.php
+++ b/Models/UploadFile.php
@@ -119,6 +119,12 @@ class UploadFile
         foreach ($files as $key => $f) {
             ++$fCounter;
 
+            if (!\is_file($f['tmp_name'])) {
+                $result[$key]['status'] = UploadStatus::FILE_NOT_FOUND;
+
+                return $result;
+            }
+
             if ($path === '') {
                 $path = File::dirpath($f['tmp_name']);
             }
@@ -240,8 +246,9 @@ class UploadFile
      */
     private function createFileName(string $path, string $tempName, string $extension) : string
     {
-        $rnd   = '';
-        $limit = -1;
+        $rnd      = '';
+        $limit    = -1;
+        $fileName = '';
 
         $nameWithoutExtension = empty($tempName) ? '' : \substr($tempName, 0, -\strlen($extension) - 1);
 
@@ -311,6 +318,8 @@ class UploadFile
      */
     private function findOutputDir() : string
     {
+        $rndPath = '';
+
         do {
             $rndPath = \str_pad(\dechex(\mt_rand(0, 65535)), 4, '0', \STR_PAD_LEFT);
         } while (\is_dir($this->outputDir . '/_' . $rndPath));
diff --git a/Models/UploadStatus.php b/Models/UploadStatus.php
index a5887e7..9fab2af 100755
--- a/Models/UploadStatus.php
+++ b/Models/UploadStatus.php
@@ -47,4 +47,6 @@ abstract class UploadStatus extends Enum
     public const FAILED_HASHING = -9;
 
     public const NOT_ENCRYPTABLE = -10;
+
+    public const FILE_NOT_FOUND = -11;
 }
diff --git a/Theme/Backend/Components/Media/pdf.tpl.php b/Theme/Backend/Components/Media/pdf.tpl.php
index 153fad0..dbe26cc 100755
--- a/Theme/Backend/Components/Media/pdf.tpl.php
+++ b/Theme/Backend/Components/Media/pdf.tpl.php
@@ -18,6 +18,6 @@ use \phpOMS\Uri\UriFactory;
 
 <section id="mediaFile" class="portlet">
     <div class="portlet-body">
-        <iframe style="min-height: 600px;" data-form="iUiSettings" data-name="iframeHelper" id="iHelperFrame" src="<?= UriFactory::build('{/backend}Resources/mozilla/Pdf/web/viewer.html?{?}&file=' . ($this->media->isAbsolute ? '' : '/../../../../') . $this->media->getPath()); ?>" allowfullscreen></iframe>
+        <iframe style="min-height: 600px;" data-form="iUiSettings" data-name="iframeHelper" id="iHelperFrame" src="<?= UriFactory::build('{/backend}Resources/mozilla/Pdf/web/viewer.html?{?}&file=' . \urlencode(($this->media->isAbsolute ? '' : '/../../../../') . $this->media->getPath())); ?>" allowfullscreen></iframe>
     </div>
 </section>
\ No newline at end of file
diff --git a/Theme/Backend/Lang/en.lang.php b/Theme/Backend/Lang/en.lang.php
index 6e99eb4..c823cf3 100644
--- a/Theme/Backend/Lang/en.lang.php
+++ b/Theme/Backend/Lang/en.lang.php
@@ -42,8 +42,8 @@ return ['Media' => [
     'Select'           => 'Select',
     'Settings'         => 'Settings',
     'Size'             => 'Size',
-    'Tag'              => '',
-    'Tags'             => '',
+    'Tag'              => 'Tag',
+    'Tags'             => 'Tags',
     'Type'             => 'Type',
     'Upload'           => 'Upload',
     'VirtualPath'      => 'Virtual Path',