Need update app

[LinLL]

When I post data to https://discord.com/api/v9/invites/xxxx, I will get the error of '{"captcha_key":["You need to update your app to join this server."],"captcha_sitekey":"76edd89a-a91d-4140-9591-ff311e104059","captcha_service":"hcaptcha"}. What's the problem of my post? '