Sharepoint::Session::UnknownAuthenticationError (Sharepoint::Session::UnknownAuthenticationError):

[tahawkins21]

I am using this gem to connect to SharePoint Online (commercial cloud). It was working yesterday, but today we are receiving Sharepoint::Session::UnknownAuthenticationError during authentication. During get_access_token, @rta and @fed_auth are nil.

Maybe a change on MS side?

The response body contains the following:

    <div id="ms-error-header" class="ms-pr">
            <h1 class="ms-core-pageTitle">

    Something went wrong

            </h1>
            <div>

            </div>
    </div>
    <div id="ms-error">
            <div id="ms-error-top">

            </div>
            <div id="ms-error-content">
                    <div id="ms-error-error-content">
                            <div id="DeltaPlaceHolderMain">

We're sorry, sign-in isn't working right now. But we're on it! Please try again later.

            </div>
            <div class="ms-spo-solutionItems">
              
            </div>
      </div>
      <div id="ctl00_PlaceHolderMain_ErrorDisplay_TechnicalHelpSection">
              <div class="ms-spo-technicalSection">
                    <div class="ms-textLarge ms-spo-technicalSectionHeader">
                      If this problem persists, contact your support team and include these technical details:
              </div>