I expect this is because a certificate needs to be installed somewhere, and I believe I know what cert needs to be installed, but I am unable to determine the cert store to install it into.
For reference, my Linux distro is Ubuntu server 18, and I installed from bin.
I don't know what to do to resolve this issue, I know that there is a certificate on the proxy in front of the server, but I don't know where to install it to resolve this, as I don't know where to put the cert, nor how to install it.