The HTTP 429 error on Instagram, meaning "Too Many Requests," usually indicates you've sent too many requests to their server in a short period. To fix it, the most common solution is to simply wait a bit and try again later. You might need to wait for a few seconds, minutes, or even longer, depending on the specific rate limit enforced by Instagram. If the error persists, you can also try clearing your browser's cache or flushing your DNS cache.