1. Solution exception:Faild to import void trans mat_x

Hi there, I try to assign a trasnslucent materian on a shading but there is an error like this:

  1. Solution exception:Failed to import void trans shading _20
    0
    0
    7 0.298 0.779 0.052 0.000 0.200 0.265 0.625

can anybody help me to what I do to fix this problem?