TF400431 : We were unable to connect to the SharePoint site: {0}. While you may continue with the upgrade, there will be ...

TF400431 : We were unable to connect to the SharePoint site: {0}.  While you may continue with the upgrade, there will be manual configuration steps required to use Team Foundation Server with this SharePoint site in the future.  It is recommended that you correct this SharePoint issue before continuing. See the configuration log for additional details that may assist in troubleshooting the problem.