there is a problem with the server's security certificate sap

Dear Experts,

We are using SAP B1 9.0 PL10 and we installed the Client in a Windows 7 computer.

When we are trying to open it and there is the message "There is a problem with the server's security certificate. The security certificate is not from a trusted certifying authority.SAP Business One is unable to connect to the server".

Regarding to this issue, we have already seen the SAP Note 2331786 - Older SAP Business One clients are suddenly unable to connect to server, but is referring to Windows 10 systems and the below thread and doc :

• SAP B1 - There is a problem with the server's security certificate - Windows 10
• SAP Business One Certificate error | SCN

Do you have any advice?

Kind Regards,

Alexandros Karadimitropoulos