Indecipherable error message when trying to log-in

[andydenyer]

The claims exchange 'RESTAPI-AuthenticateUserWithDNP' specified in step '10' returned HTTP error response with Code 'BadRequest' and Reason 'Bad Request'.

All of our family accounts have been seeing this message when trying to log in to webmail this morning.  If we persevere, we all manage to get logged in eventually, but what on earth does that error message mean?  I get the 'invalid username or password' one as that's usually down to some mis-typing.  But this is something completely different.

[Gadgeman]

Hi did you get this resolved and if so what did you have to do?

[shadders]

I was receiving this message, so i just attempted to log in multiple times, in quick succession, and was able to log in.

Definitely a fault.

[miken115]

It means a failure to authenticate your login.  As another here said, try and try again.

[Gadgeman]

Thanks i'll keep trying

[Gadgeman]

Thank you

[PMB06]

Tried several times but ended up deleting my BT Email cookies and worked first time.