Having an issue trying to authorise.
Getting the message as follows:-
A communication failure between Opera 3 and HMRC has occurred (S500). There are several reasons why this can happen.
Having closed and restarted, upgraded to V2.60.12, still getting the above error.
We have done what has been suggested from Pegasus, anybody any other ideas which could help.
Pegasus have suggested the following:-
It is the Scheduler Server which communicates with HMRC in regards to the authorisation of the MTD VAT Centre.
They need to ensure that the Opera / Scheduler server has internet access and that the default web browser is not set to block all cookies.
The other reason could be temporary issue at HMRC.
Our development team have provided the following (you need both addresses):
Firewall ports for MTD for VAT:
These are the endpoints we need to connect to in order to send an MTD for VAT submission.
api.service.hmrc.gov.uk
(currently 23.43.20.111)
And
opera3.azurewebsites.net
(currently 137.117.211.244)
