Why can't I create edge loops inside of my mesh The edge loops do not go on the inside of the cube wall. I made the wall from a cube following a floor plan. I tried using the knife tool but the edges it generated were not able to be selected. What is a solution to this. The walls all have 4 vertices and are not n-gons.
Thanks
Blend File: https://drive.google.com/file/d/1Ktpjiulkh9Ij2qSE3IGn35xmdYjVs1Ur/view?usp=sharing
Here's the problem:

Loop cut only works on quads, but inner wall face has some extra verts. I assume you have a window or something on the other side.
You could fix your topology by having those loops continue all the way around. You usually want most of the mesh to be quads, exectly to not encounter problems such as this.