Hi
Im a PhD student and after about 18 months I was manage to publish a paper in well reputed conference. In our university rule there is viva after 18 months where they ask you about your progress. I was a bit de tracked from my main research area. Now The university commitee has asked me to re appear for the viva. The thing is my supervisor before viva told me that I am not progressing well so I must think about the converting my degree into masters. He dont want me to go for the viva but I still did.Now committee has asked me to prepare again due to the narrow scope of research and gave me 3 months. my supervisor is not talking to me. what should I do?

What do you mean you de tracked from your main research area? Did you work on an unrelated research away from your PhD?

You also went against your supervisor's recommendation on not going for viva and downgrading to master. It is natural that he doesn't speak to you. You can either somehow apologise and downgrade to master as he suggested or go solo and hope for the best. Is there anyone else you can talk to? Postdoc or research fellow?