HTTP ERROR 431 - This page isn’t workingIf the problem continues, contact the site owner.

[arnisraido]

Past last few month we started to get random error for customers. Paypal page shows HTTP 431 or HTTP 400 error.

For one example: paypal-debug-id: aec79e1e0df8e

Debugging request with Postman e.g. sometimes processes request correctly.

Changing IP link from https://www.paypal.com/cgi-bin/webscr to https://ipnpb.paypal.com/cgi-bin/webscr did help for Postman, but not for live site.

The process for customer is:

1. We create a cart

2. customer is redirectoed to "confirm" page, where "Confirm" button is displayed

3. "COnfirm" button creates POST of IPN Web form to Paypal IPN url.

4. Customer is redirected to LOGIN page of Paypal, where correct "amount" is displayed.

5. as soon as Customer logins into Paypal - he receives HTTP ERROR 431 code.

Debugging showed, that if I shorten request ( e.g. from 12 items, to 9, by dropping last 3) - works for one example (from mentioned debug-id).

Looking through POST product did not see any specific differences in dropped items. 

All product names ar in Cyrillic. But request length would be not an issue, as we had ~60 items ordered before with no problems.

Can someone recommend a solution of Paypal support to look on?

[icicic]

Hi,

I have this problem too.

I set up IPN added a link to PP and ocassionally this works, but most of the time it gives a 431 (headers are too large) error, I tried clearing my cookies and this did make it work, but obviously this is not something that you can expect clients to do.

Did you find a solution?