SAML 2.0 IDP: issuer problem

Thanks for the help.

Well, the response is very fast, so I don’t believe this is a timeout thing. I also think it could be something related to special chars, but I removed them too but the error persists.
In the Assertion part of the XML, I got the issuer correct, without break lines:

    <saml:Issuer>MY_ISSUER_HERE</saml:Issuer>

But in the root node I got a LINE BREAK CHAR:

<saml:Issuer
    xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">MY_ISSUER_HERE
</saml:Issuer>

Instead of

<saml:Issuer
    xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">MY_ISSUER_HERE</saml:Issuer>

I was wondering, is that possible to strip/trim the issuer value in a Auth0 Rule tourgh a JavaScript code? Something like:

function (user, context, callback) {
    context.issuer = context.issuer.strip()
}

This could be a bug in the Auth0 systems. How can we discard this option?

Thanks again