How to route Vdd and Vss to CD4011 in Pcbnew
You are missing "Unit E" of the quad pack.  How this symbol works is there is a part of each of the quad (Unit A -> Unit D) and then an additional one for the power.

Your first image shows it but then the next images does not. 




So your circuit should have 5 components. So a quick throwaway design:



Finally the layout with a quick ground trace to see all GND pins highlighted



In short, ensure all parts of a multi-symbol part are placed and wired