SGN 8 :: Invalid Response Code while C/R

Hi Folks,

 

Recently we have upgraded the SGN server from 7 to 8 & after migration, C/R are not working at all for a couple of machines. Whenever we try to follow recovery process, the machine returns with as Error "Invalid Response Code" attaching the screenshot for the reference. We tried repeating the recovery process for more than 4 to 5 times but the outcome was the same. nowadays this issue is so frequent &  happening on weekly basis. Is there any known issue with SGN 8.0.