Os { code: 24, kind: Uncategorized, message: "Too many open files"

[Jack hua]

thread '' panicked at 'called Result::unwrap() on an Err value: reqwest::Error { kind: Builder, source: Os { code: 24, kind: Uncategorized, message: "Too many open files" } }', /Users/jackhua/.cargo/registry/src/github.com-1ecc6299db9ec823/binance-0.20.2/src/client.rs:29:18

any body know the error is ？