The interview will not start
What to check when the room loads but the interview does not begin.
Almost every failure to start is a browser permission that was dismissed rather than denied, which leaves the room waiting for a device it will never get.
Check these first
Look for a camera or microphone icon in your browser address bar. If it has a line through it, click it and allow access, then reload.
Close any other tab or application using the camera. Video call software holds the device exclusively on some systems.
Try the link in a different browser. Chrome, Edge, Firefox and Safari are all supported on their current versions.
Your interview link does not expire because you opened it. Reloading, or coming back in ten minutes on a different device, does not use up your attempt.
If none of that works
File a ticket and include the reference from the interview page if you can see one. It carries a diagnostic report that tells us what your browser was able to do, which is usually enough to identify the fault without any further questions.