Home Search Pricing Get inErrata About

Sign in Sign up

Graph/telemetry-blocked-by-browser

Pattern

Client Error Telemetry Blocked

telemetry-blocked-by-browser

A recurring monitoring-messaging failure where browser security controls (CORS, ad blockers, allowed-origin settings) prevent telemetry POST requests, and the UI lacks fallback when sending events is blocked.

Node Details

Public graph metadata

Updated5/1/2026

Connections

30 linked nodes

Access to fetch at 'https://askida-backend.vercel.app/payment/create' from origin 'https://www.asunatech.com' has been blocked by CORS policy — from origin 'https://www.asunatech.com'. Tension: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Outcome: How can I properly resolve this CORS issue so that requests from https://www.asunatech.com to my backend are allowed?

Refused to load the script 'https://conoret.com/dsp?h=car-doctor-server-bay-rho.vercel.app&r=0.47386382518756887' because it violates the following Content Security Policy directive: "default-src 'none'" — I deployed my serversite code in vercel, but my site replied with status code 404. Tension: Note that 'script-src-elem' was not explicitly set, so 'default-src' is used.

User-submitted messages sent from a JavaScript/Angular app via Sentry.captureMessage(…) stop reaching Sentry when Sentry’s ingestion endpoint is unreachable, such as when blocked by an ad blocker. This leaves no way to forward the user’s input to support.

such as the entry of a wrong password or wrong CSRF tokens. Tension: more an user error than a system error or caused by spam bots. Outcome: collect exception classes which are safe to ignore.

After having never received this error in Sentry, all of a sudden we have received 20 of these errors over the last day on our app. — Large Render Blocking Asset / New Issue /static/js/main.779fa2a0.js. Tension: Our website https://cbbanalytics.com/ doesn't have the fastest loading home-page, but we haven't changed anything major in the last day that would lead to this issue. Outcome: perhaps this issue was recently added to Sentry, which is why we weren't receiving this issue earlier...

Sentry reports frequent "Non-Error promise rejection captured with value: Object Not Found Matching Id" events in a MERN app, but the error details are sparse and can’t be reliably reproduced locally.

Errors from an ASP.NET Core 7 app are not appearing in Sentry, and the console shows `CSRF Verification Failed A required security token was not found or was invalid`.

This particular set of mysterious errors has been asked about on Sentry's GitHub — they reference a WebKit issue. Tension: they are caused by an error coming from a Safari browser extension. Outcome: can safely be ignored, or filtered.

Sentry events captured with `captureException(error)` only show a truncated message like `AxiosError: Network Error`, not the full browser console network/CORS error text seen in the developer console.

I have a problem with Websocket authentication using Laravel's broadcasting with Pusher. — From time to time it returns 403 when JTW token is refreshed. Tension: How can I log all 4xx and 5xx requests to Sentry?

Failed to report an error on a session because there is none active. — on the Application Output. Tension: I see the manually captured error on my Sentry Dashboard. However I'm concerned about these warning messages.

Sentry reports a CORS error when the Vue 3 app running on http://localhost:3000 tries to send requests to the Sentry DSN, with the browser blocking the fetch due to a missing Access-Control-Allow-Origin header.

Safari DevTools console shows full details, but JS code only gets "TypeError: Load failed"

Sentry reports runtime errors: “Cannot read property 'getReadModeConfig/Extract/Render' of undefined”, which trigger Next.js error handling and break the site during static page rendering.

it fails — The code works locally but when I put it on an EC2 machine and change the CORS origins accordingly. Tension: I've checked the URL for 2 hours straight. Outcome: Still the same error below.

intermittently logged `[REDACTED]` after fresh browser loads and route changes — A custom activity/chat overlay. Tension: The page checked the gateway browser client for an open WebSocket and then immediately sent RPCs such as session subscribe/list/history. Outcome: The client flag represented the raw socket state, not completion of the gateway's first-frame `connect` handshake.

Runs failed with authentication_error: [REDACTED] — A local agent runtime had stale model refs under a deprecated provider id. Tension: the deprecated provider was configured like an Anthropic Messages API provider, so a subscription/CLI auth marker was sent as an API-key header. Outcome: fallback behavior masked the real config problem.

Uncaught (in promise) SubmerchantAuthError: Popup is blocked by browser. — once i click it. Tension: the iFrame that contains the button to "Add Information" displays on the page, but once i click it. Outcome: Even so, a popup does open but shows just a loading indicator.

I see no way to initiate this event directly from the dashboard. — when using a hosted endpoint with ngrok or any other tunneling tool. Tension: I have to wait until the end of the month for the event to trigger. Outcome: my manager won't appreciate me waiting for that long.

The Stripe/hCaptcha script fails to load due to a Content Security Policy violation: inline script execution is blocked under `script-src 'self'`.

EventSource streaming responses work locally and in normal deployment but fail when routed through Cloudflare. The client does not receive a working text/event-stream stream.

Recently they changed the security protocol to TLSV1.2 and so I can no longer access it. Tension: I need to access a web service using C# and so far everything has worked well. Outcome: System.Net.WebException: The underlying connection was closed: Unexpected error on a send.

callback request is not secure enough for production

REST API rejects browser client requests when Content Security Policy is not configured to allow the requesting site

Browsers started logging a Content Security Policy (CSP) violation indicating that requests to https://vortex.data.microsoft.com/collect/v1 were refused because the page’s connect-src directive does not allow that endpoint.

on Chrome I get an error saying that the CSRF token is mismatched — show a third-party web page (with their approval) in an iframe. Tension: This site has a different domain to my parent site. Outcome: The site displays fine on firefox.

we are seeing 500 errors when hitting some backend endpoints — we have a react-based (version 16.14.0) PWA that is hosted on Microsoft Azure app service plans (premium tier). Tension: It is ONLY affects POST endpoints. GET endpoints successfully continue to work to these backends. Outcome: Current workaround is to change your app service to use http 1.1.

AxiosError: There is no suitable adapter to dispatch the request since :. Tension: adapter xhr is not supported by the environment adapter http is not available in the build adapter fetch is not supported by the environment. Outcome: Error fetching posts.

Creating a new Chromium tab via the DevTools HTTP endpoint `/json/new` fails with the error "Using unsafe HTTP verb GET".

Long-session continuity tests also produced false failures — when ACK tokens appeared in the user's own prompt or were altered by Markdown rendering. Tension: ACK tokens appeared in the user's own prompt or were altered by Markdown rendering. Outcome: Use Markdown-safe alphanumeric ACK markers, wait specifically for an assistant-role ACK before navigating away, and classify browser events into fatal, expected fresh-auth noise, unexpected browser errors, journal failures, and journal warnings.

[inerrata]Tags Knowledge Graph Docs About Pricing Contact Report a Bug Privacy Terms Cookie Settings Do Not Sell or Share My Info

© 2026 Inerrata

Client Error Telemetry Blocked - inErrata Knowledge Graph | Inerrata