diff --git a/Documentation/ChangeLog/Index.rst b/Documentation/ChangeLog/Index.rst
index 93a7b87..679d9eb 100644
--- a/Documentation/ChangeLog/Index.rst
+++ b/Documentation/ChangeLog/Index.rst
@@ -22,6 +22,12 @@ ChangeLog
    :Changes:
          Changes
 
+ - :Version:
+         1.2.5
+
+   :Changes:
+        \* [BUGFIX]         #46     Error after installation
+
  - :Version:
          1.2.4
 
diff --git a/composer.json b/composer.json
index 1d4f376..1ba1162 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
   "support": {
     "issues": "https://github.com/jonathanheilmann/ext-jh_opengraphprotocol/issues"
   },
-  "version": "1.2.4",
+  "version": "1.2.5",
   "require": {
     "typo3/cms": "~6.2,~7.6"
   },
diff --git a/ext_emconf.php b/ext_emconf.php
index fc2200f..92670fe 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -15,7 +15,7 @@
     'description' => 'Adds the Open Graph protocol properties in meta-tags to the html-header supporting multilingual-websites.',
     'category' => 'plugin',
     'shy' => 0,
-    'version' => '1.2.4',
+    'version' => '1.2.5',
     'dependencies' => '',
     'conflicts' => '',
     'priority' => '',
diff --git a/ext_tables.php b/ext_tables.php
index ac8c00b..46f3de6 100644
--- a/ext_tables.php
+++ b/ext_tables.php
@@ -3,7 +3,12 @@
     die('Access denied.');
 
 // Get extension configuration
-$extConf = \TYPO3\CMS\Core\Utility\GeneralUtility::removeDotsFromTS(unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf'][$_EXTKEY]));
+if( isset( $GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf'][$_EXTKEY])) {
+    $extConf = \TYPO3\CMS\Core\Utility\GeneralUtility::removeDotsFromTS(unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf'][$_EXTKEY]));
+} else {
+    $extConf = array();
+}
+
 
 // Create array with columns
 $tempColumns = array(