When you follow a hashtag on Mastodon, you expect to see public posts using that tag from across the entire fediverse. Instead, your home feed shows only posts from your local instance. This behavior is not a bug but a deliberate design choice tied to how Mastodon handles federated visibility and timeline filtering. This article … Read more
You have written a post in Mastodon, attached an image or a video, set a specific date and time for it to publish, and then clicked Schedule. Instead of confirming the post is queued, the interface shows an error or the Schedule button remains grayed out. This problem occurs because Mastodon currently does not support … Read more
You upload an image to Mastodon, write your post, and hit publish. But when you check the post, the alt text you carefully wrote is gone. The media appears without a description, leaving the post inaccessible to screen reader users. This problem occurs because Mastodon’s web interface and some third-party apps handle alt text metadata … Read more
When you export your Mastodon follows to a CSV file and then import that file into a new account, some accounts are silently skipped. You might notice that your follower count on the new profile is lower than expected. This usually happens because the CSV import process is strict about account format and instance reachability. … Read more
When you request a data export from your Mastodon account, the server generates a compressed archive and sends you a download link. That link expires after a short period, typically 24 hours or less, depending on your instance’s configuration. If you try to download the archive after the link has expired, you will see an … Read more
You try to sign in to your Mastodon account using a WebAuthn security key, but the browser shows “Sign-in failed” with error code 401. This problem occurs when the WebAuthn credential stored on your key does not match the challenge or origin expected by the Mastodon server. In this article, you will learn why the … Read more
When you try to log in to your Mastodon account through a web browser, you may see the error message “Could Not Reach the Server.” This happens when the browser cannot establish a connection to the Mastodon instance’s server. The error can appear on any instance, whether you use mastodon.social, a small community server, or … Read more
When you submit a form in Mastodon, such as logging in, posting a status, or changing settings, you might see the error CSRF Token Mismatch. This error means the security token that verifies your browser session did not match what the server expected. The cause is usually a stale or missing session cookie, a browser … Read more
When you see Mastodon Error 422 with the message “Validation Failed,” the server has rejected your request because the data you sent does not meet its rules. This error often appears when posting, following accounts, or uploading media. The problem usually stems from malformed API requests, expired session tokens, or content that violates instance-specific limits. … Read more
When you post multiple toots in quick succession, Mastodon may respond with a “Rate limit exceeded” error and block your account from posting for several minutes. This happens because Mastodon instances enforce rate limits to prevent spam and reduce server load. The error typically appears as an HTTP 429 status code with a message like … Read more