Transparent Bricks In Stud.io

[mocbuild101]

I have a problem with building in Stud.io - every time I try to build or import, all the bricks are transparent:

Does anyone know why this is happening?

Edited April 6, 2018 by mocbuild101

[Jarema]

Try turn off collision detection / Red triangle with exclamation mark /

[mocbuild101]

1 hour ago, Jarema said:

Try turn off collision detection / Red triangle with exclamation mark /

Even 1 brick by itself is transparent, although I have tried that.