Where is the last module?

[solemn haven]

My friend and I played the entire game, studied the entire map, and we cannot find the last module

[slim thorn]

This is not a bug. I answered you in the chat about Hello Engineer, but I'll duplicate it here.

Try to pass some attraction several times. After finding a part of the rocket for the passage of the attraction, first you will receive blueprints for its passage, and then plastic cubes.