It was bug in BO 4.0 (SAP BusinessObjects BI Platform 4.0 installable.) Can you check the below steps in your Server and
To resolve this, you should open Central Configuration Manager and click Server Intelligence Agent. Right click on the SIA and choose the properties. Uncheck the System Account and provide the credential which can start the service. It looks like bug in SAP BusinessObjects BI Platform 4.x installable
And if not works please share the Installation logs
Thanks,
Daya