Job exited without an error, exit code 0. PAPI error code 5. 10: Failed to delocalize files

Hi,

I'm trying to uncompress some files using Firecloud. I get this error:

 Task helloUncompressGZ.UncompressGZ:NA:1 failed. Job exited without an error, exit code 0. PAPI error code 5. 10: Failed to delocalize files: failed to copy the following files: "/mnt/local-disk/Sample1.wig -> gs://fc-afaa23cb-8cd5-4c96-8a6c-caebe89b1b75/43e82d6a-6d73-469d-9bcc-fe9db73c7461/helloUncompressGZ/aa1b2a82-f68f-4c5c-809a-29035fd4170f/call-UncompressGZ/Sample1.wig (cp failed: gsutil -q -m cp -L /var/log/google-genomics/out.log /mnt/local-disk/Sample1.wig gs://fc-afaa23cb-8cd5-4c96-8a6c-caebe89b1b75/43e82d6a-6d73-469d-9bcc-fe9db73c7461/helloUncompressGZ/aa1b2a82-f68f-4c5c-809a-29035fd4170f/call-UncompressGZ/Sample1.wig, command failed: CommandException: No URLs matched: /mnt/local-disk/Sample1.wig\nCommandException: 1 file/object could not be transferred.\n)"

Here is my WDL

workflow helloUncompressGZ {
  call UncompressGZ
}

task UncompressGZ {
  String sampleName
  File inputGZ
  String docker
  command {
  gunzip ${inputGZ}
  }
  output {
    File outputGZ = "${sampleName}.wig"
  }
  runtime {
        docker: docker
  }
}

Let me know if you need more info. Thanks.