python3.7 ./siaslice.py -m  -b 40 -t --debug /pics_bak/enc_partition.img backupdrive

[204] POST /renter/validatesiapath/backupdrive {}
[200] GET /renter/dir/backupdrive {}
Traceback (most recent call last):
  File "./siaslice.py", line 638, in <module>
    main()
  File "./siaslice.py", line 275, in main
    start(None)
  File "./siaslice.py", line 273, in start
    asyncio.run(amain(args, stdscr=stdscr))
  File "/usr/lib/python3.7/asyncio/runners.py", line 43, in run
    return loop.run_until_complete(main)
  File "/usr/lib/python3.7/asyncio/base_events.py", line 579, in run_until_complete
    return future.result()
  File "./siaslice.py", line 290, in amain
    block_size=args.block*1000*1000, stdscr=stdscr)
  File "./siaslice.py", line 312, in do_mirror
    await storage.update()
  File "./siaslice.py", line 169, in update
    for siafile in siafiles:
TypeError: 'NoneType' object is not iterable