why i cannot draw with tres-meshlibrary

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:bust_in_silhouette: Asked By Drachenbauer

i made a scene, that is a spatial, that contains a mesh-instance with a wall-block-cube-mesh as a child.

han i used the convert to meshlib in the file-menu to convert it to a meshlib of type tres.

but now i cannot draw with the block, that appears in the palette of the gridmap.

why this?