Yeah just a reminder to everyone – addons are actually disabled globally in the 2.8 alpha, save for a very few exceptions. Specifically, any addon that has a yellow triangle warning sign at the right end of its row in the list, will NOT work. Even if you tick the box to “activate” it, it will be ignored. Which is the vast majority of them, and definitely any you try to install from a file yourself.
If you click the tick box for a disabled addon, you may notice a dark text box pop up at the bottom of prefs window; it doesn’t last long and is difficult to read in time, but it does say that the addon is being ignored despite your activating it.