diff --git a/func/main.sh b/func/main.sh
index 280267c4..f9d1a329 100755
--- a/func/main.sh
+++ b/func/main.sh
@@ -556,7 +556,7 @@ validate_format_email() {
 
 # Username
 validate_format_username() {
-    if ! [[ "$1" =~ ^[0-Z]+(\.[0-Z]+)?$ ]] || [[ "${#1}" -gt 28 ]]; then
+    if ! [[ "$1" =~ ^[0-z]+(\.[0-z]+)?$ ]] || [[ "${#1}" -gt 28 ]]; then
         echo "Error: $2 $1 is not valid"
         log_event "$E_INVALID" "$EVENT"
         exit $E_INVALID
diff --git a/web/inc/main.php b/web/inc/main.php
index be27f456..5df9e1bd 100644
--- a/web/inc/main.php
+++ b/web/inc/main.php
@@ -30,6 +30,7 @@ function top_panel($user, $TAB) {
     exec ($command, $output, $return_var);
     if ( $return_var > 0 ) {
         header("Location: /error/");
+        exit;
     }
     $panel = json_decode(implode('', $output), true);
     unset($output);