Sudden Errors on all jobs after CS2 working fine for several jobs

Hello,

After using CSv.2 for several jobs (particle import, 2D classification and 2D class selection) cryosparc stopped working for all jobs, even if I clone a previously successful job and try to re-run it. The error I get upon trying to relaunch a 2D classification job is :

Traceback (most recent call last):
File “cryosparc2_worker/cryosparc2_compute/run.py”, line 78, in cryosparc2_compute.run.main
File “cryosparc2_worker/cryosparc2_compute/jobs/class2D/run.py”, line 53, in cryosparc2_compute.jobs.class2D.run.run_class_2D
File “cryosparc2_compute/particles.py”, line 30, in init
self.from_dataset(d) # copies in all data
File “cryosparc2_compute/dataset.py”, line 321, in from_dataset
self.data = other.data.copy()
AttributeError: ‘NoneType’ object has no attribute ‘data’

Any idea how to troubleshoot? Thanks in advance,

Petya