you can try the registry from this article https://www.veritas.com/support/en_US/article.100032372
having said that, you may want to check the software compatibility list for BE 2012 ,to ensure the OS is supported for BE 2012.
I had tried to update the registry but still no luck.
just for the info, actually I can restore last time two or three weeks ago without issue.
thanks and Regards,