SAP BI- Launchpad create certificate for using Launchpad with Chrome

Hi there,

when starting SAP BI Launchpad I get the message "web site is not safe" I think I have te create a certificate also for Chrome like IE. Does anyone know how to create a certificate for Chrome?
For info: SSO is already set up and should also work for Chrome.
Please the exact steps because I because I never created any certificates. I think I have to create this in SAP BO Server.

Thank you and best regards