Mastodon APに接続できません

[rokejulianlockhart (Mr. Beedell, Roke Julian Lockhart (RJLB))]

//mastodon.social/oauth/authorize に接続しようとすると、次のメッセージが表示されます。

要求されたスコープが無効、不明、または形式が正しくありません。

実証として:

A Screencast That Demonstrates That Discourse Meta Fails To Connect To Mastodon.Social

I cannot upload a GIF, for a non-descript error appears

For meta.discourse.org/t/398803/1, I attempted to upload an image/GIF file. However, Discourse returns a non-descript error, despite the file being 15 FPS, and < 600 KiB: "response": { "status": 422, "statusText": "", "httpVersion": "HTTP/2", "content": { "mimeType": "application/json; charset=utf-8", "size": 63, "text": "{\"errors\":[\"Sorry, but your upload failed. Please try again.\"]}" }, "redirectURL": "", "headersSize": 438, "bodySize": 501 },