SSL_ERROR_RX_RECORD_TOO_LONG when trying to open 1 PPM Project

Dear PPM Guru,

I am trying to get my CPRXRPM 610_740 - SP 0 (PPM 6.1) on my IDES EHP7 working.

I did follow this thread https://scn.sap.com/thread/3779302

and apply most of (ConfigContPPM61SP01.pdf). and so far so good my URL below is working.

<Protocol>://<Host>.<Domain>.< Extension>:<Port>/sap/bc/nwbc/

But as shown in the attached pic, I am facing SSL_ERROR_RX_RECORD_TOO_LONG error pop up when trying to open existing project.

Could anyone help me pointing to which area should I look and fix this problem?

Below are roles assigned to my userID:

SAP_BCV_ADMIN

SAP_BPR_PPM

SAP_CFX_ADMINISTRATOR

SAP_CPR_PROJECT_ADMINISTRATOR

SAP_RPM_BCV_USER

SAP_XRPM_ADMINISTRATOR

Thank in advance for any help!.

Best regards,

Deddy