The site owner implemented Rate Limiting that affects your visitor traffic
If you are a site visitor, contact the site owner to request exclusion of your IP from rate limiting.
If you are the site owner, review Cloudflare Rate Limiting thresholds and adjust your Rate Limiting configuration.
If your Rate Limiting blocks requests in a short time period such as 1 second, try increasing the time period to 10 seconds.
Unable to purge is another 1015 error code related to Cloudflare cache purge. Retry the cache purge and contact Cloudflare support if errors persist.