Describe the bug
Some GoDaddy accounts cannot restore backups, 500 error produced when trying to run the restoration.

Fatal error: Uncaught Error: Class 'ZipArchive' not found in /home/user/public_html/wp-content/plugins/boldgrid-backup/admin/class-boldgrid-backup-admin-restore-helper.php:242
Stack trace:
#0 /home/user/public_html/wp-content/plugins/boldgrid-backup/admin/class-boldgrid-backup-admin-core.php(2180): Boldgrid_Backup_Admin_Restore_Helper->set_writable_permissions('/home/yneisrpij...')
#1 /home/user/public_html/wp-content/plugins/boldgrid-backup/admin/class-boldgrid-backup-admin-core.php(2682): Boldgrid_Backup_Admin_Core->restore_archive_file()
#2 /home/user/public_html/wp-includes/class-wp-hook.php(288): Boldgrid_Backup_Admin_Core->wp_ajax_restore('')
#3 /home/user/public_html/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters('', Array)
#4 /home/user/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#5 /home/user/public_html/wp-admin/admin-ajax.php(175): do_action('wp_ajax_boldgri...')
#6 {main} thrown in /home/user/public_html/wp-content/plugins/boldgrid-backup/admin/class-boldgrid-backup-admin-restore-helper.php on line 242

Expected behavior
If ZipArchive is not available on the server then Total Upkeep should at least report to users that the required functionality is not available to restore a backup.