my nickname on steam not sync with discord , when i chat only show discord nickname not steam

[DiscordExtension] [Error]: Rest Request Exception (Discord API Error). Plugin: DiscordSync by Tricky & OuTSMoKE v1.3.0 ID: 17150793362165465089 Request URL: [PATCH] guilds/998886696466780181/members/998885122268987413 Content-Type: application/json; charset=utf-8 Http Response Code: Forbidden Discord Error Code: 50013 Discord Error: Missing Permissions
Discord Errors: Request Body:
{"nick":"Flechen"}