Fatal error on latest update Class ‘Boldgrid\Library\Library\Ui\Card’ not found

Today I updated the plugin to latest (1.14.7) version and it started to fail:

Fatal error: Uncaught Error: Class ‘Boldgrid\Library\Library\Ui\Card’ not found in /wp-content/plugins/boldgrid-backup/admin/card/class-amazon-s3.php:23 Stack trace: #0 /wp-content/plugins/boldgrid-backup/includes/class-boldgrid-backup.php(254): require_once() #1 /wp-content/plugins/boldgrid-backup/includes/class-boldgrid-backup.php(70): Boldgrid_Backup->load_dependencies() #2 /wp-content/plugins/boldgrid-backup/boldgrid-backup.php(81): Boldgrid_Backup->__construct() #3 /wp-content/plugins/boldgrid-backup/boldgrid-backup.php(147): run_boldgrid_backup() #4 /wp-admin/includes/plugin.php(2297): include(‘/home/dh_m4ik2p…’) #5 /wp-admin/plugins.php(191): plugin_sandbox_scrape(‘boldgrid-backup…’) #6 {main} thrown in /wp-content/plugins/boldgrid-backup/admin/card/class-amazon-s3.php on line 23

needs help