net::ERR_BLOCKED_BY_CLIENT
A browser extension (ad blocker, privacy tool) blocked the request.
Seen on:
JavaScript
Meaning
URLs containing words like ads, analytics, track, banner or affiliate are blocked by filter lists. Your own endpoints can be caught too.
Common causes
- Ad blocker filter matching the URL
- Privacy extension blocking trackers/analytics
- Your API path contains “ads”/“analytics”
⚡ Quick fix
- Test in a private window without extensions
- Rename endpoints that look like ad/tracking URLs
- Don’t rely on third-party scripts for critical features
Detailed fix by platform
JavaScript
- Serve analytics via first-party paths that don’t match common filter rules
How to diagnose
- Extension — Does it work with extensions disabled?
- URL — Does it contain ad/track keywords?
🔧 Still not fixed?
Many errors look alike. If the steps above didn’t solve it, one of these is probably what you’re facing:
Similar errors
Most viewed in JavaScript
Other ways to find it
Where this error sits
Origin: On your device. Errors that are often confused with or caused by this one (click to open):
🧠 Still stuck? Analyze your error
Paste the full message, response headers or stack trace — we'll detect the platform and point to the most likely cause.
💬 What worked for others
No tips yet — did something else fix this for you?
Share what worked for you
Tips are checked by an editor before they appear. Links are removed.
Did this fix work for you?
Report a correction or suggest an improvement
Last updated 9 Oct 2026