}
// Needed to match the correct template in a module that uses a different theme than the user/site/default
- $theme = Strings::sanitizeFilePathItem($_GET['theme'] ?? null);
+ $theme = Strings::sanitizeFilePathItem($_GET['theme'] ?? '');
if ($theme && is_file("view/theme/$theme/config.php")) {
$a->setCurrentTheme($theme);
}