Bug with Mac OS X Leopard clients

[phananh0901]

I'm trying to use WebOne with Leopard on my PowerBook G4, but for some reasons, I couldn't connect to any sites like Google, YouTube or Facebook due to this error (screenshots on both my PowerBook and my host Windows machine). For context, the ROVP works and the FTP file transfer too.
I'm using Aquafox (fork of TenFourFox aka Firefox for old PPC Macs) on my PowerBook currently, Safari is kind of working for Google, but not at all for Facebook and probably not on sites like SourceForge.
I don't know if this is my error on setting up or not, but hope I can get some help here :D
Here's the one on my host machine and when using Aquafox:

Here's with Safari:

[atauenis]

Seems that you need to import WebOne root certificate.
https://github.com/atauenis/webone/wiki/Installing-the-Root-Certificate

SEC_ERROR_UNKNOWN_ISSUER means that root certificate is not understood or not imported. Probably Safari is experiencing something similar, but it does not displaying detailed error message (I currently have not tested WebOne with MacOS Safari at all).