I've created a view with a block of upcoming civicrm events with links to the online registration pages. Only the administrator can get to the registration page. Anonymous and authorized users get this message:
"Sorry but we are not able to provide this at the moment. XML data could not be loaded. Make sure you specified the correct path.
Return to home page."
Anonymous and authorized users have permission for
CiviEvent:register for events, CiviEvent:view event info , CiviCRM:access all custom data.
The CiviEvent is setup to allow online registration.