2.8 Basic Unwrap Problem? https://www.youtube.com/watch?v=0trhFMBdVzI&amp;feature=youtu.be 
Video of the problem

Right, so I have a problem. I just downloaded 2.8beta and I can't unwrap anything it seems. Unless I am completely misunderstanding a new workflow. 

Seems when I try to unwrap something, it doesn't appear inside the UV editor.
And whenever I try to open a side panel or do anything there I get a message that reads

Tool 'Select Box' not found for space 'IMAGE_EDITOR'.
In 2.8 where is new View mode in uv/image editor.
In this mode where is no UVs or mask or painting tools are display. To edit UV you need to switch to UV edit mode:

 

New View mode is good for viewing image for reference.

Note, that where is new UV editing workspace with uv/image editor with uv edit mode by default:



Tool 'Select Box' not found for space 'IMAGE_EDITOR' it is just a warning don't pay attention to it.