Other Trouble with HTTPS Connection to Mirror-Networking Server on Ubuntu 20.04

Hello everyone,

My team and I are currently developing a multiplayer browser game implemented with Mirror-Networking. We have successfully deployed the server on our Ubuntu server and can play the game without any issues when serving it over HTTP. However, we need to connect to the server using HTTPS, so we created a certificate and are now serving the server over HTTPS. Unfortunately, when we try to connect in the client, we receive an error in the browser (as shown in the first screenshot) and the server log indicates a handshake failure. We're puzzled and unsure about the root cause of this issue.

We are using Ubuntu 20.04 for the server.

If anyone could provide assistance or guidance on this matter, we would be immensely grateful.

Thank you and best regards, Lorenz