Transaction not yet indexed

521PCTUuoaQsh7HcTeFkyEcCZGGcj28EuaVWNxkMSC3UTSkvkcST4i7S3VBaWzDntpW6dpheyw6mxZXMswZH9Zu5

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.