After upgrading from v5.6.3 to v5.7.1, when accessing the reports site and clicking ANY of the reports, the following error occurs:
"An error has occurred during report processing. (rsProcessingAborted)
Cannot impersonate user for data source 'DataSource'. (rsErrorImpersonatingUser)
Log on failed. Ensure the user name and password are correct. (rsLogonFailed)
For more information about this error navigate to the report server on the local server machine, or enable remote errors."
The 'shared data source' that all the reports are using cannot be edited. When trying to set a new password, the message 'Password is not valid' appears next to the password field, even typing the correct password.