fix index js warning

diff --git a/src/documents/templates/index.html b/src/documents/templates/index.html
index b45ce31d2dd806ab48b4327021b91e0ccd929107..2778bce7ab63ea8051f7c9aa6976ce1c06113a11 100644 (file)
--- a/src/documents/templates/index.html
+++ b/src/documents/templates/index.html
@@ -23,8 +23,10 @@
                <script type="text/javascript">
                        setTimeout(() => {
                                let warning = document.getElementsByClassName('warning').item(0)
-                               warning.classList.remove('hide')
-                               warning.classList.add('show')
+                               if (warning) {
+                                       warning.classList.remove('hide')
+                                       warning.classList.add('show')
+                               }
                        }, 8000)
                </script>
                <style type="text/css">