can't see gridmap in rviz

[P1terQ]

My device is Ubuntu18.04. Grid map works fine in my packages before. However, after i catkin_make the grid_map package, gridmap can't be visualized in the rivz anymore. What's more, except the simple_demo.launch, there is nothing in the rviz after i click the gridmap choice in all other launch files in the grid_nap package.