Website Migration not working

I`m trying to migrate my site using SNAPSHOT MIGRATION WIZARD, but it is not working, this message appears:

"We could not locate the wp-config.php file in your backup."

https://static.livechatinc.com/8801096/P5HCI6A8X6/c24e27315257fdb863affe93a9dfd468/portal-das-receitas-01.png