no skins with the grid

im building a website with Xtheme and I’ve activated The Essential Grid. There are no essential grids found. I know there are supposed to be a bank of skins available for me to choose from but none appear. Ive tired to create new skins as well but an error message appears saying, “empty ajax response.” I went to Import full demo data and nothing imported.
in not sure what the problem is… can you help?