## TL;DR

Steps that confirmed it: disable ad blockers and privacy extensions, try a different network (phone hotspot is a quick test), and check your router or firewall rules. If events flow on another network, the cause is the block, not your code.

## Steps

1. When events stop arriving and your code looks right, check whether something on the network is blocking Amplitude. Several users traced this to ad blockers, browser privacy extensions, a VPN, or a regional network block on the Amplitude endpoint. Steps that confirmed it: disable ad blockers and privacy extensions, try a different network (phone hotspot is a quick test), and check your router or firewall rules. If events flow on another network, the cause is the block, not your code. One user reported that switching the transport to xhr seemed better, but that was never confirmed, so do not rely on it.

## When to use

You are seeing this: Amplitude - [!--- Please fill out the template to the best of your ability --] ## Expected Behavior expect that no response error when sending event to amplitude ## Current Behavior [image] I found some issue on sentry. Use this skill when you run into "Amplitude Logger [Error]: Failed to fetch".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

## Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

## Sources

- https://github.com/amplitude/Amplitude-TypeScript/issues/579