I have tried to get my AMEX linked to my Concur account. I get the following error every time. American Express denies it is there issue. 

Updated Information Required

We couldn't complete your request because the American Express Business Cards (@ work) site asks that you verify your personal details. Please visit the site and follow the prompts to update your information. Once updated  you can tap REFRESH to continue (Error 429). 

So when I click the link there are no prompts. My information is updated.  

Note Error 429 is as follows:

The HTTP 429 Too Many Requests response status code indicates the user has sent too many requests in a given amount of time ("rate limiting"). A Retry-After header might be included to this response indicating how long to wait before making a new request.

Can anyone help. AMEX denies its their issue and SAP doesn't have chat or a phone number to call from my portal.