A problem occurred accessing the credentials required for this Web Part. The cause of this error is that the SharePoint stored ...

A problem occurred accessing the credentials required for this Web Part. 

The cause of this error is that the SharePoint stored credential named [{0}], which is required by the web console environment named [{1}] that this Web Part instance uses, has not yet been set. Contact your SharePoint Administrator to set this credential.

System error text: {2}