Fix PHP8 warning

1 files changed, 1 insertions, 1 deletions

diff --git a/index.php b/index.php
index 56a00cced..1fb7aba5f 100644
--- a/index.php
+++ b/index.php
@@ -140,7 +140,7 @@ if ($RCMAIL->task == 'login' && $RCMAIL->action == 'login') {
             parse_str($url, $query);
 
             // prevent endless looping on login page
-            if ($query['_task'] == 'login') {
+            if (!empty($query['_task']) && $query['_task'] == 'login') {
                 unset($query['_task']);
             }