Unable to open Theme settings on UI in Drupal 10

When I changed the admin theme with other admin themes then theme settings are opened but is has issues with the Claro as admin theme .As, I opened the theme settings with claro as the admin theme it is giving the error .

In core/themes/claro/claro.theme
Change Line 1006

// Remove 'container-inline' class from the main attributes and add a flag
// instead.
// @todo remove this after https://www.drupal.org/node/3059593 → has been
// resolved.
if (!empty($variables['attributes']['class'])) {
if(is_array($variables['attributes']['class'])){ <-------------------Added
$container_inline_key = array_search('container-inline', $variables['attributes']['class']);

if ($container_inline_key !== FALSE) {
unset($variables['attributes']['class'][$container_inline_key]);
$variables['inline_items'] = TRUE;
}
}<-------------------Added
}

if (!empty($variables['attributes']['class'])) {
// Convert to array if it's a string
if (is_string($variables['attributes']['class'])) {
$variables['attributes']['class'] = explode(' ', $variables['attributes']['class']);
}

if (is_array($variables['attributes']['class'])) {
$container_inline_key = array_search('container-inline', $variables['attributes']['class']);

if ($container_inline_key !== FALSE) {
unset($variables['attributes']['class'][$container_inline_key]);
$variables['inline_items'] = TRUE;
}
}
}