There appears to be an error after transitioning to a new Subscan importer format. Wallets refuse to sync with absolutely no data imported giving a 404 error. As a workaround - please add the transactions manually. Primarily, connect existing transfers to/from other wallets. Aggregate and add the staking rewards/trades etc., via Koinly UI. https://support.koinly.io/en/articles/9489979-how-to-add-transactions-manually Developers are investigating the issue, a sample dataset was provided already.