@gnusocialjp ログを見てみたら、フォローしに行っているところで蹴られて、public keyが見つからないと怒られている感じなんですかねー。
2023-02-24 07:26:28 LOG_ERR: [xxx.xsrv.jp:28426.c41d97ed POST /gnu/public/index.php/main/remotefollowsub] HTTPClient: HTTP POST https://mstdn.jp/inbox - 401 Unauthorized
2023-02-24 07:26:28 LOG_DEBUG: [xxx.xsrv.jp:28426.c41d97ed POST /gnu/public/index.php/main/remotefollowsub] ActivityPub Postman: Delivery result with status code 401: Public key not found for key https://xxx.xsrv.jp/gnu/public/index.php/user/1#public-key
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