You have bricks enabled that are conflicting with either glass panes or plate bricks.
what bricks are these that will conflict?
EDIT: I have done a clean install of blockland because I had too much stuff in the game anyway. The problem is still presisting even though I downloaded your "complete" save file:
(ignore the incorrect colors I, I took this when the colorset wasn't applied)
EDIT 2:
Console log shows this:
Direct load saves/Harambe High.bls, 3, 0, 1,
LOADING BRICKS: saves/Harambe High.bls (ColorMethod 3)
WARNING: loadBricks() - DataBlock not found for brick named "2x30F"
WARNING: loadBricks() - DataBlock not found for brick named "1x24F"
WARNING: loadBricks() - DataBlock not found for brick named "4x24F"
WARNING: loadBricks() - DataBlock not found for brick named "2x24F"
WARNING: loadBricks() - DataBlock not found for brick named "4x32F"
WARNING: loadBricks() - DataBlock not found for brick named "1x4x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x32H"
WARNING: loadBricks() - DataBlock not found for brick named "1x24H"
WARNING: loadBricks() - DataBlock not found for brick named "8x8 Zone Cube"
WARNING: loadBricks() - DataBlock not found for brick named "16x16 Zone Cube"
WARNING: loadBricks() - DataBlock not found for brick named "PC Classic"
WARNING: loadBricks() - DataBlock not found for brick named "1x24x2"
WARNING: loadBricks() - DataBlock not found for brick named "1x30x3"
WARNING: loadBricks() - DataBlock not found for brick named "1x1x4"
WARNING: loadBricks() - DataBlock not found for brick named "2x4 Zone Plate"
WARNING: loadBricks() - DataBlock not found for brick named "Trash Bin"
WARNING: loadBricks() - DataBlock not found for brick named "Trash Bin No Lid"
WARNING: loadBricks() - DataBlock not found for brick named "2x30x2"
WARNING: loadBricks() - DataBlock not found for brick named "Team Spawn Point"
WARNING: loadBricks() - DataBlock not found for brick named "1x8x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x30x2"
WARNING: loadBricks() - DataBlock not found for brick named "keyboard"
WARNING: loadBricks() - DataBlock not found for brick named "1x6x3F TV"
WARNING: loadBricks() - DataBlock not found for brick named "PC Custom"
WARNING: loadBricks() - DataBlock not found for brick named "2x2 Corner Full"
WARNING: loadBricks() - DataBlock not found for brick named "Mouse"
WARNING: loadBricks() - DataBlock not found for brick named "1x24x5"
WARNING: loadBricks() - DataBlock not found for brick named "2x2x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x6x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x24x4"
WARNING: loadBricks() - DataBlock not found for brick named "3x30F"
WARNING: loadBricks() - DataBlock not found for brick named "1x16x4"
WARNING: loadBricks() - DataBlock not found for brick named "2x4x4"
WARNING: loadBricks() - DataBlock not found for brick named "2x16x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x3x1FF Monitor"
WARNING: loadBricks() - DataBlock not found for brick named "2x6x4"
WARNING: loadBricks() - DataBlock not found for brick named "2x3x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x24"
WARNING: loadBricks() - DataBlock not found for brick named "1x32x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x30"
WARNING: loadBricks() - DataBlock not found for brick named "1x4x2F Monitor"
WARNING: loadBricks() - DataBlock not found for brick named "1x15x4"
WARNING: loadBricks() - DataBlock not found for brick named "2x30x1"
WARNING: loadBricks() - DataBlock not found for brick named "1x14x4"
WARNING: loadBricks() - DataBlock not found for brick named "2x10x4"
WARNING: loadBricks() - DataBlock not found for brick named "Octogrill"
WARNING: loadBricks() - DataBlock not found for brick named "1x12x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x30x5"
WARNING: loadBricks() - DataBlock not found for brick named "2x30x5"
WARNING: loadBricks() - DataBlock not found for brick named "2x8x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x1F Handle"
WARNING: loadBricks() - DataBlock not found for brick named "1x10x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x30x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x2x4"
WARNING: loadBricks() - DataBlock not found for brick named "1x3x4"
WARNING: loadBricks() - DataBlock not found for brick named "2x30x4"
WARNING: loadBricks() - DataBlock not found for brick named "4x30F"
EDIT 3:
I have fixed a lot of the missing bricks, it appears the save is missing a lot of bricks from Demain's brick pack here:
Demain's brick packsThe rest of the missing bricks are zone bricks and spawn points