Ah thanks → I am now getting
panicked at 'called `Result::unwrap()` on an `Err` value: Custom { kind: Other, error: "Response errors; The start time must be set after the latest block time: 4611686020102744001" }', tests/harness.rs:84:80
This is weird because before I execute the code that produced blocks, I do
chain_info().await.unwrap().latest_block; and that returns block number 1 and block time is None.