Found it. The issue is the output filename you entered, "<HC.RAGEDOX>". GenePattern treats any input values between the greater and and less than signs as a tag it is supposed to substitute from another parameter or from a server configuration item. Since there is no module or server substitution for <HC.RAGEDOX> it is ending up with nothing for the output filename.
I think what you want for output filename is either "HC.RAGEDOX" without the <> or else "<input.filename_basename>" which will take the name of your input filename, strip off the 3-letter extension and substitute that in at runtime. These will both have the same result with this input file, but the second option will also change to match different input files.
Hope this helps
Ted