On what computer operating system is your Premiere Elements 12 running on? Have you updated 12 to 12.1 yet with an opened project's
Help Menu/Update? If not, please do so.
I am assuming that your burn to is to DVD-VIDEO on DVD disc and not AVCHD format on DVD disc.
Before you hit the Burn button in the burn dialog, what are the readings there for Space Required and Bitrate?
In the burn to disc process, where are you getting your error
Encoding of Menus 1 of....
Burn to disc
If you cannot get burn to disc DVD to work for you, can you get burn to Folder (4.7 GB) to work for you to produce the saved folder
with the VIDEO_TS Folder?
Let us start here and then we can decide what next.