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
You try to post a status update on Mastodon and see the error message “Could not verify authenticity.” This error stops the post from being published and often appears after a network hiccup or session timeout. The cause is a mismatch between the signature your client sends and what the server expects. This article explains … Read more
When you run a federation check on your Mastodon instance, the tool may return the error “Instance Not Reachable” for another server. This error means your instance cannot establish a connection to that remote server. The cause is usually a firewall rule, a DNS misconfiguration, or the remote instance blocking your IP address. This article … Read more
When you try to move your Mastodon account to a new instance, the platform may show the error message “Could not move account” and stop the migration process. This error usually occurs because the old account’s API token has expired, the new account was created on the wrong server, or the migration handshake between the … Read more
When you try to boost a post on Mastodon, the system may stop you with the error message: Maximum number of boosts reached. This error appears because Mastodon enforces a daily rate limit on the number of boosts a single user account can perform within a 24-hour window. The limit exists to prevent spam and … Read more
When you export your Mastodon archive and try to re-import it into the same or a different instance, the process may fail with the error message “Statuses could not be downloaded.” This error typically occurs because the archive file is malformed, the import server cannot reach the original instance, or the archive references deleted or … Read more
When you open your Mastodon client or web app and see the message “Network Error” on the login screen, you cannot sign in or access your home timeline. This error usually means the app cannot reach the Mastodon server or the server is not responding correctly. The problem can stem from an incorrect server URL, … Read more