php 8.5

DeprecatedUsing null as an array offset is deprecated, use an empty string instead

1. wp-includes/functions.php:1189
2. FS_Contact_Form_Manager->get_standalone_link()
   wp-content/plugins/wp-google-places-review-slider/freemius/includes/managers/class-fs-contact-form-manager.php:80
3. Freemius->add_submenu_items()
   wp-content/plugins/wp-google-places-review-slider/freemius/includes/class-freemius.php:18874
4. Freemius->_prepare_admin_menu()
   wp-content/plugins/wp-google-places-review-slider/freemius/includes/class-freemius.php:18469
5. do_action('admin_menu')
   wp-admin/includes/menu.php:168

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