When I try to restore the framework settings, an error comes out.

I tried and managed to fix the error but the admin notice on saving and restoring the options is not showing.

Can you please fix this issue.

Fatal error: Uncaught Error: Call to undefined method WPSFramework_Settings::add_settings_error() in /app/public/wp-content/plugins/wpb-testimonial/admin/classes/settings.php:353 Stack trace: #0 /app/public/wp-includes/class-wp-hook.php(288): WPSFramework_Settings->validate_save(Array) #1 /app/public/wp-includes/plugin.php(203): WP_Hook->apply_filters(Array, Array) #2 /app/public/wp-includes/formatting.php(4314): apply_filters('sanitize_option...', Array, '_wpsf_new_optio...', Array) #3 /app/public/wp-includes/option.php(297): sanitize_option('_wpsf_new_optio...', Array) #4 /app/public/wp-admin/options.php(274): update_option('_wpsf_new_optio...', Array) #5 {main} thrown in /app/public/wp-content/plugins/wpb-testimonial/admin/classes/settings.php on line 353

Thanks