Cloud Sync to Backblaze B2 fails

I have a Cloud Sync setup to BackBlaze B2.  It's about 4.5GB in size.  Snapshot was not enabled.

The task seems to run forever.

Checking /tmp/middleward/jobs/ the last file sync'd is over over 12 hours ago.

When I clicked on the RUNNING label under Tasks > Cloud Sync it showed the attached image for over 10 minutes so the task appeared to be stuck.

I stopped the task and got this error:

Error: Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/middlewared/job.py", line 349, in run
    await self.future
  File "/usr/local/lib/python3.7/site-packages/middlewared/job.py", line 386, in __run_body
    rv = await self.method(*([self] + args))
  File "/usr/local/lib/python3.7/site-packages/middlewared/schema.py", line 961, in nf
    return await f(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/middlewared/plugins/cloud_sync.py", line 1007, in sync
    await rclone(self.middleware, job, cloud_sync)
  File "/usr/local/lib/python3.7/site-packages/middlewared/plugins/cloud_sync.py", line 218, in rclone
    await asyncio.wait_for(check_cloud_sync, None)
  File "/usr/local/lib/python3.7/asyncio/tasks.py", line 414, in wait_for
    return await fut
  File "/usr/local/lib/python3.7/site-packages/middlewared/plugins/cloud_sync.py", line 377, in rclone_check_progress
    read = (await proc.stdout.readline()).decode()
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xa0 in position 112: invalid start byte
 

I looked through /var/log/middlewared.log and could only find the entry where rclone starts and no errors after that.