Almost certainly due to the license files not being received/saved/uploaded correctly to the .astrobox folder. The files should have no file extension, but you should be able to view text within the file when viewing in a text editor. One file should be 32 bytes in size and the other 545 bytes.
If you are on a Mac then I can say from experience that the Mac messes the files up when downloading/saving. Ensure the files have the file sizes above, no extension and visible text within the file when viewing them.