# Pdfjs document type.js:415 post https://pi.pdfjs.express/events net::err\_failed

**URL:** https://pdfjs.community/t/pdfjs-document-type-js-415-post-https-pi-pdfjs-express-events-net-err-failed/2815
**Category:** Technical Support
**Tags:** pdfjs-express
**Created:** [August 29, 2023, 8:50am UTC](https://pdfjs.community/t/pdfjs-document-type-js-415-post-https-pi-pdfjs-express-events-net-err-failed/2815 "2023-08-29T08:50:54Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![kkim](https://avatars.discourse-cdn.com/v4/letter/k/3ab097/32.png) [@kkim](https://pdfjs.community/u/kkim)
#### Post date: [August 29, 2023, 3:33pm UTC](https://pdfjs.community/t/pdfjs-document-type-js-415-post-https-pi-pdfjs-express-events-net-err-failed/2815/2 "2023-08-29T15:33:38Z")

</div>

Hi there,

Thank you for contacting pdf.js express forums,

The network request to [pi.pdfjs.express/events](http://pi.pdfjs.express/events) is for telemetry purposes, see this post here:  
[What does the call to "https://pi.pdfjs.express/events" means? - #3 by system](https://pdfjs.community/t/what-does-the-call-to-https-pi-pdfjs-express-events-means/1518/3)

This should not impact the browser’s functionality but it is likely one of your extensions is blocking the telemetry data.

Best regards,  
Kevin Kim

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