Transaction not yet indexed

AmZbX8zWCJCfWhrHCqPqVRm63VDvmm6WhC5ih2XEwRjvjzbMZS7ii1aReuvQJQxDUWkvDVkVqqqoxVdzRko3Tu3

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