error below : protocol error for h2-server when trying to run in browser

[hiqsociety]

error below : protocol error for h2-server when trying to run in browser

cargo run --example h2-server --release
    Finished release [optimized] target(s) in 0.08s
     Running `target/release/examples/h2-server`
listening on Ok(0.0.0.0:8080)
listening on Ok(0.0.0.0:8080)
listening on Ok(0.0.0.0:8080)
listening on Ok(0.0.0.0:8080)
  -> err=Error { kind: GoAway(b"", PROTOCOL_ERROR, Library) }
  -> err=Error { kind: GoAway(b"", PROTOCOL_ERROR, Library) }
  -> err=Error { kind: GoAway(b"", PROTOCOL_ERROR, Library) }
  -> err=Error { kind: GoAway(b"", PROTOCOL_ERROR, Library) }