This is the error I recive while trying to invite others to the preview from my organization. Recived this error with Mozilla Firefox and Google Chrome web browsers, both are running current versions.
Server Error in '/' Application.
The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.