Transaction not yet indexed

5C21DVTUpbjSRpYg9zSPFcrs2RSAJxmjxm9MfTF6RQjsv2aGTigzn3XGbe4EszeAycBX2C8UXgigQxtjLhp4jHrH

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