Why did my interviewee not show up at all for the interview?

I had a Zoom interview today. I entered the Zoom 3-4 minutes earlier than the meeting time. The interviewee did not show up. I emailed him after waiting 15 minutes. Now it has been 25 minutes and I still got no response. I told him we could reschedule but now I don't want to. What should I do? Should I join the second time if he wants to reschedule?

Why did my interviewee not show up at all for the interview?
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