About FixMyError.net
A hand-maintained reference of 972 error messages across 57 categories, each with a plain-English explanation, a copy-paste fix, and a link to the authoritative documentation.
What this site is for
When you paste an error message into a search engine you usually get a forum thread from 2017 with three contradictory answers and no explanation of why any of them work. This site exists to be the other thing: a short, current, checkable answer that tells you what the message actually means before it tells you what to type.
Every entry has the same shape: what the error means, a fix you can copy, and where to read more. Every category also has a debugging guide, because the most valuable thing is rarely the one command; it is knowing how to narrow down that whole class of problem next time.
How to use it well
- Search the literal message. The search is fuzzy, so paste the distinctive part of the error rather than a description of it:
x509: certificate signed by unknown authorityrather than "ssl broken". - Read the explanation before the fix. Most errors have several causes; the explanation tells you which one you are looking at.
- Use the category guide. If the quick fix does not apply, the "how to diagnose" section on each page works for the whole class of error.
- Star what you use. Favourites are stored in your browser and can be exported as JSON from the toolbar.
- Keyboard shortcuts. Press / or Ctrl+K to search, ? for the full list.
How entries are written
Entries are written by hand, not generated in bulk. Each one is checked against primary documentation (the vendor's own docs, an RFC, or the project's issue tracker) and that source is linked on the page so you can verify it yourself rather than trusting this site.
Keeping it current
Software changes and fixes rot. Entries carry the date they were added, recent additions are flagged, and the RSS feed lists new entries as they are published. The database was last rebuilt on 12 September 2026.
Recently added
- Svelte 5: State referenced in its own scope will never updateSvelte 路 added 12 September 2026
- Svelte 5: `$effect` can only be used inside an effectSvelte 路 added 12 September 2026
- Svelte 5: Updating state inside a derived is forbiddenSvelte 路 added 12 September 2026
- Svelte 5: `$props()` can only be used at the top level of componentsSvelte 路 added 12 September 2026
- SvelteKit: Cannot prerender pages with actionsSvelte 路 added 12 September 2026
- Elixir: (KeyError) key :name not found in: %{"name" => "ada"}Elixir 路 added 12 September 2026
Corrections and contributions
Corrections are genuinely welcome, particularly for entries that have gone stale. Email [email protected] with the error title and what should change. New entries are most useful when they include the exact message text, a reproducible cause, and a link to primary documentation.
Privacy
There is no analytics script, no advertising and no third-party tracking on this site. Favourites, search history and your theme preference are stored in your own browser's local storage and are never sent anywhere.