diff --git a/apps/files_encryption/files/error.php b/apps/files_encryption/files/error.php
new file mode 100644
index 0000000000..3118299b51
--- /dev/null
+++ b/apps/files_encryption/files/error.php
@@ -0,0 +1,18 @@
+<?php
+if (!isset($_)) { //also provide standalone error page
+	require_once '../../../lib/base.php';
+
+	$l = OC_L10N::get('files_encryption');
+
+	// check if ajax request
+	if(!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
+		\OCP\JSON::error(array('data' => array('message' => $l->t('Your private key is not valid! Maybe the your password was changed from outside.'))));
+	} else {
+		header('HTTP/1.0 404 ' . $l->t('Your private key is not valid! Maybe the your password was changed from outside.'));
+		$tmpl = new OC_Template('files_encryption', 'invalid_private_key', 'guest');
+		$tmpl->printPage();
+	}
+
+	exit;
+}
+?>
diff --git a/apps/files_encryption/lib/helper.php b/apps/files_encryption/lib/helper.php
index 3e581a6ee3..daa95f3f89 100755
--- a/apps/files_encryption/lib/helper.php
+++ b/apps/files_encryption/lib/helper.php
@@ -194,4 +194,13 @@ class Helper {
 
 		return $relPath;
 	}
+
+	/**
+	 * @brief redirect to a error page
+	 */
+	public static function redirectToErrorPage() {
+		$location = \OC_Helper::linkToAbsolute('apps/files_encryption/files', 'error.php');
+		header('Location: ' . $location);
+		exit();
+	}
 }
\ No newline at end of file
diff --git a/apps/files_encryption/lib/stream.php b/apps/files_encryption/lib/stream.php
index dee5a7cccc..3c1eb2c5f5 100644
--- a/apps/files_encryption/lib/stream.php
+++ b/apps/files_encryption/lib/stream.php
@@ -116,6 +116,11 @@ class Stream {
 
 		} else {
 
+			if($this->privateKey === false) {
+				// if private key is not valid redirect user to a error page
+				\OCA\Encryption\Helper::redirectToErrorPage();
+			}
+
 			$this->size = $this->rootView->filesize($this->rawPath, $mode);
 		}
 
@@ -239,12 +244,8 @@ class Stream {
 			// if there is no valid private key return false
 			if ($this->privateKey === false) {
 
-				if (\OC_Util::isCallRegistered()) {
-					$l = \OC_L10N::get('core');
-					\OCP\JSON::error(array('data' => array('message' => $l->t('Private key is not valid! Maybe the user password was changed from outside if so please change it back to gain access'))));
-					throw new \Exception('Private key for user "' . $this->userId
-										 . '" is not valid! Maybe the user password was changed from outside if so please change it back to gain access');
-				}
+				// if private key is not valid redirect user to a error page
+				\OCA\Encryption\Helper::redirectToErrorPage();
 
 				return false;
 			}
@@ -450,10 +451,6 @@ class Stream {
 		// if there is no valid private key return false
 		if ($this->privateKey === false) {
 
-			if (\OC_Util::isCallRegistered()) {
-				$l = \OC_L10N::get('core');
-				\OCP\JSON::error(array('data' => array('message' => $l->t('Private key is not valid! Maybe the user password was changed from outside if so please change it back to gain access'))));
-
 				// cleanup
 				if ($this->meta['mode'] !== 'r' && $this->meta['mode'] !== 'rb') {
 
@@ -469,12 +466,8 @@ class Stream {
 					\OC_FileProxy::$enabled = $proxyStatus;
 				}
 
-				throw new \Exception('Private key for user "' . $this->userId
-									 . '" is not valid! Maybe the user password was changed from outside if so please change it back to gain access');
-			}
-
-
-			return false;
+			// if private key is not valid redirect user to a error page
+			\OCA\Encryption\Helper::redirectToErrorPage();
 		}
 
 		if (
diff --git a/apps/files_encryption/templates/invalid_private_key.php b/apps/files_encryption/templates/invalid_private_key.php
new file mode 100644
index 0000000000..b0ff1db599
--- /dev/null
+++ b/apps/files_encryption/templates/invalid_private_key.php
@@ -0,0 +1,10 @@
+<ul>
+	<li class='error'>
+		<?php $location = \OC_Helper::linkToRoute( "settings_personal" ) ?>
+
+		<?php p($l->t('Your private key is not valid! Maybe the your password was changed from outside.')); ?>
+		<br/>
+		<?php p($l->t('You can unlock your private key in your ')); ?> <a href="<?php echo $location?>"><?php p($l->t('personal settings')); ?>.</a>
+		<br/>
+	</li>
+</ul>