Second this. The plugin is generating critical error on PHP8.0
Fatal error: Uncaught Error: array_key_exists(): Argument #2 ($array) must be of type array, stdClass given
in /wp-content/plugins/wp-responsive-menu/inc/includes/class-wprmenu-sanitization.php on line 129
Call stack:
wpr_of_sanitize_enum()
wp-includes/class-wp-hook.php:292
WP_Hook::apply_filters()
wp-includes/plugin.php:212
apply_filters()
wp-content/plugins/wp-responsive-menu/inc/includes/class-wprmenu-framework-admin.php:425
WPRMenu_Framework_Admin::validate_options()
wp-includes/class-wp-hook.php:294
WP_Hook::apply_filters()
wp-includes/plugin.php:212
apply_filters()
wp-includes/formatting.php:4907
sanitize_option()
wp-includes/option.php:369
update_option()
wp-admin/options.php:314