SSD Error with 3.1

Hi,

All my jobs fail when ssd caching is set to be true with the error below.

I have tried removing workers via the icli interface and adding them again but they all stop with the same error. SSD path and permissions look good.

[CPU: 90.1 MB]   Project P36 Job J67 Started

[CPU: 90.1 MB]   Master running v3.1.0, worker running v3.1.0

[CPU: 90.3 MB]   Running on lane shark

[CPU: 90.3 MB]   Resources allocated: 

[CPU: 90.3 MB]     Worker:  shark.qb3.berkeley.edu

[CPU: 90.3 MB]     CPU   :  [0, 1]

[CPU: 90.4 MB]     GPU   :  [0]

[CPU: 90.4 MB]     RAM   :  [0, 1, 2]

[CPU: 90.4 MB]     SSD   :  True

[CPU: 90.4 MB]   --------------------------------------------------------------

[CPU: 90.4 MB]   Importing job module for job type class_2D...

[CPU: 405.8 MB]  Job ready to run

[CPU: 405.8 MB]  ***************************************************************

[CPU: 406.1 MB]  Using random seed of 1623841468

[CPU: 406.1 MB]  Loading a ParticleStack with 11 items...

[CPU: 406.1 MB]   SSD cache : cache successfuly synced in_use
[CPU: 406.1 MB]  Traceback (most recent call last):
  File "cryosparc2_worker/cryosparc2_compute/run.py", line 85, in cryosparc2_compute.run.main
  File "cryosparc2_worker/cryosparc2_compute/jobs/class2D/run.py", line 64, in cryosparc2_compute.jobs.class2D.run.run_class_2D
  File "cryosparc2_compute/particles.py", line 61, in read_blobs
    u_blob_paths = cache.download_and_return_cache_paths(u_rel_paths)
  File "cryosparc2_compute/jobs/cache.py", line 114, in download_and_return_cache_paths
    used_mb = sync_hits(worker_hostname, ssd_cache_path, instance_id)
  File "cryosparc2_compute/jobs/cache.py", line 191, in sync_hits
    rc.cli.cache_sync_hits(worker_hostname, keys, sizes_mb)
  File "cryosparc2_compute/client.py", line 57, in func
    assert False, res['error']
AssertionError: {u'message': u"OtherError: argument should be a bytes-like object or ASCII string, not 'list'", u'code': 500, u'data': None, u'name': u'OtherError'}

drwxrwxr-x 3 cryosparc nogales-current 4096 Mar 5 18:00 cryosparc-scratch