Translations:API:FAQ/28/en

This is usually because you're either not passing a token at all (read about tokens in the documentation of the module you're using) or because you're having trouble staying logged in. It's also possible you're reusing a type of token that can't be reused (see module documentation for details) or that you're using a token that's associated with an expired session. In general, when using cached tokens, refetch the token (generally using action=tokens) and try again before giving up.