When you run a Mastodon server and try to re-federate a user profile from the admin panel, you might see the error “Could not re-federate profile.” This error means the server failed to push the profile data to other instances in the fediverse. The cause is usually a temporary network issue, a misconfigured domain block, … Read more
You try to log in to Mastodon using a third-party app like Tusky, Fedilab, or Metatext and see the error message: OAuth App Authorization Failed. This error occurs because the OAuth handshake between the app and the Mastodon server breaks due to a mismatched redirect URI, expired token, or blocked callback. This article explains the … Read more
When you try to open the Mastodon admin dashboard and see the error message ‘You are not authorized,’ you cannot manage users, view reports, or change server settings. This error usually means your account does not have the correct admin role assigned in the database or the role has become corrupted. This article explains the … Read more
When you search for a user on Mastodon by their full handle, you may see the error message “Lookup Failed” instead of the profile results you expect. This happens because Mastodon searches across the federated network of instances, and the lookup request can fail due to connectivity problems, instance blocks, or incorrect handle formatting. This … Read more
When you try to enable web push notifications in Mastodon, you may see the error Push Notification Failed. This stops the browser from sending real-time alerts for replies, boosts, and follows. The error usually happens because the browser cannot register a service worker or the push subscription endpoint is blocked. This article explains the three … Read more
When scrolling through your Mastodon timeline, you might see the message Could not load more posts. This error stops you from viewing older toots and can interrupt your browsing. The problem often comes from a temporary network issue, a server-side rate limit, or a corrupted local cache. This article explains the root causes and provides … Read more
When you try to upload a new profile photo in Mastodon, the browser may display the error message Could not save profile photo and reject the image. This error occurs because the uploaded file does not meet the server’s strict validation rules for format, dimensions, or file size. In this article, you will learn the … Read more
When you attempt to create a new Mastodon account and see the error message “Email already taken,” it means the email address is already linked to an existing account on that instance. This can happen even if you have never used Mastodon before, or if you tried to sign up earlier and did not complete … Read more
When you try to reply to a Direct Message on Mastodon, the system may block your response with the error ‘You cannot reply to this post.’ This happens because Mastodon enforces strict reply visibility rules. The platform restricts which users are included in a DM thread’s audience. This article explains why the error occurs, how … Read more
When you try to follow a hashtag in Mastodon, you may see the error message “Could not find hashtag.” This happens even when the hashtag exists and is actively used on the instance. The error prevents you from subscribing to updates for that topic, which breaks a core feature of the platform. This article explains … Read more