I cannot start a new collaboration session in the VS Code live share extension. I'm connected to a server remotely via SSH using the official "Remote - SSH" extension by Microsoft. I tried to start a new session with my colleague like this:
1. Start a new collaboration session using Cmd+Shift+P

I start a live share session like usual using the VS Code Live Share extension.
2. It asks me to sign in, which I do

I sign in using GitHub or Microsoft (I've tried both). It is weird that VS Code requests a sign in at all because usually, it's not required.
3. I get this error message

An error popup opens: "Starting collaboration session: certificate has expired"
What does this error mean and how to fix it?