thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: EPERM'

[gonewind73]

./phantun_client --local 127.0.0.1:5501 --remote azurewind:5509 thread 'main' panicked at 'called Result::unwrap() on an Err value: EPERM', phantun/src/bin/client.rs:162:10 note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

./phantun_server --local 5501 --remote 127.0.0.1:5509 thread 'main' panicked at 'called Result::unwrap() on an Err value: EPERM', phantun/src/bin/server.rs:161:10 note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

how to solve it?

[gonewind73]

use sudo ， it is running