Im sorry if this has already been answered but I searched and came up empty. I installed 3cx with pbxexpress on my google cloud vm instance and I am having a problem logging into it due to the certificate issue. I read over the info you have available and downloaded the generator and created a key and csr for it. when I try to install the certificate in my browser, however, it says that it is an unknown file type. any ideas? I realize the certificate files I created have to be uploaded to my cloud 3cx but I cant get to that point if they wont install in my browser.