Hi Albert
The errors occurs because EPM add-in cannot ignore the security certificate like IE.
Please follow the steps below:
1. Install the CA to Trust Root Certification Authorities
2. Make sure the Issued by is itself otherwise you need get the CA of "Issued by" as well.
3. Make sure you don't get the warning below when accessing the BPC web client again.
4. Launch EPM add-in from home page or BPF.
Best regards,
Chuan