This is CM 12 Theme chooser theme. You must be running a custom rom that has it or it will not work.
I recommend reverting back to stock theme prior to updating the theme. After you update you may need to reboot.
The goal of this theme is to give you some texture back from all the flat material look everywhere so if you prefer flat, this theme is not for you!
Due to Theme chooser being in the early stages, there are limitations with theme chooser. Not everything will work including icons.
I have included over 1100 custom icons!!!
Make sure when you update you reboot afterwards to ensure everything is themed properly!
Whats's themed for now:
Dialer
SystemUi
Settings
Framework
Keyboard (AOSP Holo White recommended)
Playstore
Lockscreen
Original Boot animation
More!
Will update frequently to fix issues that arise.