Fix login error message display broken in b51de327

1 files changed, 1 insertions, 1 deletions

diff --git a/index.php b/index.php
index 04362ef16..5ca2af608 100644
--- a/index.php
+++ b/index.php
@@ -157,7 +157,7 @@ if ($RCMAIL->task == 'login' && $RCMAIL->action == 'login') {
             RCMAIL::ERROR_INVALID_HOST     => 'invalidhost',
         );
 
-        $error_message = !is_numeric($auth['error']) ? $auth['error'] : ($error_labels[$error_code] ?: 'loginfailed');
+        $error_message = !empty($auth['error']) && !is_numeric($auth['error']) ? $auth['error'] : ($error_labels[$error_code] ?: 'loginfailed');
 
         $OUTPUT->show_message($error_message, 'warning');