You probably have too many datablocks. Disable/delete some unneeded add-ons.
What about disabling some? You did that too?
You have to enable the cubes. They should be in the brick section.
you do know i made a topic about this a few days ago, try to search, and disable more addons
Did that, didn't work anyways.
search your problem, in this case missing, cubes, missing cubes, something like that, only select help, and it will show you with topics that have that in their title, and it always works, if you use it right