I am the author of an add-on for Blender 2.8.
I have one user that is experiencing an error. I understand what is causing it, but I don't understand why.
My add-on is selecting the "Standard" option from this list:
The user, however, does not have that option. Hist list looks like this (note also the different Display Device):
We are both using clean installs of the latest Blender 2.8 beta (11 July 2019 build).
What exactly is "sRGB / BT.709"? Why does he have this option, whereas I do not?

