Chrome Browser Error: Attestation check for Topics on https://pagead2.googlesyndication.com/ failed

Facing the Same Issue?

Disable the attestation check while deactivating the topic API by setting the header:

Permissions-Policy: browsing-topics=()

This can be done in an .htaccess file as well:

<IfModule mod_headers.c>
    Header set Permissions-Policy "browsing-topics=()"
</IfModule>

Try Disabling Browser Extensions

Some browser extensions can trigger this warning. Try disabling them to see if it resolves the issue.

Solution for Node.js + Express

const express = require("express");
const app = express();

app.use((req, res, next) => {
    res.append('Permissions-Policy', 'browsing-topics=()');
    next();
});

Experimental Feature: browsing-topics

The browser checks for the browsing-topics Permission-Policy and fails to find it because most websites have not implemented this experimental feature yet.

Refer to the MDN Web Docs for more information: Permission-Policy

Set the Permission-Policy Header

To avoid the dev console error, set the Permission-Policy header as follows:

Permissions-Policy: browsing-topics=()

You can also do this in an .htaccess file:

<IfModule mod_headers.c>
    Header set Permissions-Policy "browsing-topics=()"
</IfModule>

For nginx:

server {
    ...
    add_header Permissions-Policy "browsing-topics=()" always;
    ...
}

For Node.js:

const express = require("express");
const app = express();

app.use((req, res, next) => {
    res.append('Permissions-Policy', 'browsing-topics=()');
    next();
});