Sorry. Change "healthBar" and "manaBar" to "healthbar" and "manabar" (lowercase "b") in the UnitFrameRegions table.
Those keys are set for in UnitFrame_Initialize, which all the unit frames call in their OnLoad scripts:
https://www.townlong-yak.com/framexm...itFrame.lua#51
The other bars/textures should all work, though.