Cannot Choose data with current layout to export data

Check that your report was publish with one the below to options in the File/Setting & Options/Options/Report Setting

Also make sure that you are clicking on the right "..." that correspond to the table.  This has happend to me in the past where i had a  drop down filter very close to the table and I am actually clicking on the dropdown filter "..." rather then the actual table i am trying to extract giving me the apperance as in your screen that there is nothing to export.