BrokenPipe error when Self-hosting

[Ho9tocraft]

ja:
セルフホスティング時（ownserver-serverをVPSに、ownserverを自宅Minecraftサーバーに設置）に、非常に高い確率で「failed to communicate with client Io(Os { code: 32, kind: BrokenPipe, message: "Broken pipe" })」というエラーがownserver-server（VPS側）に、「cid=(client-id) Malformed protocol control packet: Os { code: 111, kind: ConnectionRefused, message: "Connection refused" }」というエラーがownserver（Minecraftサーバー側）に表示され、接続が確立できません。
Rust知識はまるでないので、対処をお願いします。

en:
When self-hosting (ownserver-server on VPS, ownserver on my Minecraft server), I get the error "failed to communicate with client Io(Os { code: 32, kind: BrokenPipe, message: "Broken pipe" })" with a very high probability on ownserver-server (VPS side). BrokenPipe, message: "Broken pipe"})" error on ownserver-server (VPS side), "cid=(client-id) Malformed protocol control packet: Os { code: 111, kind ConnectionRefused, message: "Connection refused" }" error appears on the ownserver (Minecraft server side) and connection cannot be established.
I have no knowledge of Rust, so please help me deal with this problem.