Hi Marq,
There is currently an issue on the SAP Server, where the Start Page points to.
It is currently being investigated at SAP.
We are sorry for the inconvenience this cause, but note that Crystal Reports is fully functional, it is only the Start Page that display error when starting Crystal Reports.
For future reference regarding this issue, and updates on this type of issue, see the SAP Knowledge Base Article:
1205429 - Error: "An error has occurred in this script on this page" when opening Crystal Reports
Patrick