Errors and hard to see steps.

Step 5: one stud of a light grey 1x3 plate is hidden by the 6x8 plate from step 4.

Step 8: yellow 1x4 plate is not supported by anything. (Thanks Zhod)

Step 12: yellow 2x8 brick is too low by a plate. (Thanks Zhod)

Step 33: Not visible: second light grey 2x3 and 2x6 plates go below light grey 1x10 plate added in step 32. (Thanks Zhod)