Code challenge type S256/sitemap.xml is not supported by this server

I am receiving occasional Failed logins, mixed in with normal, Successful logins. There are two similar descriptions I am looking for assistance with:

  1. Code challenge type S256/sitemap.xml is not supported by this server.
  2. Code challenge type S256/robots.txt is not supported by this server.

I’ve not been able to find help topics related to this, so any help would be greatly appreciated.

Hi @eric12,

Can you provide an example /authorize request for your application? I looked internally, and these errors can come about due to malformed /authorize requests.

I look forward to your reply!

Thanks,

Mary Beth

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