Extensions like AdBlock, uBlock Origin, Privacy Badger, or script blockers (NoScript) can interfere with Cloudflare’s ability to run the challenge script.

: Privacy tools, ad blockers (like uBlock Origin or AdBlock Plus), and script blockers (like NoScript) often flag the challenges subdomain as a tracker and block it. Disable them temporarily to see if the site loads.

If you use a custom DNS service (like NextDNS , Pi-hole , or AdGuard Home ), the domain might be included in a "blocklist" intended to stop telemetry or advertisements.

Error Code: 1020, 1015, or similar.

The challenges.cloudflare.com block usually happens for one of three reasons:

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