Error: cuInit failed: unknown error (during refinement)


I got this error message today when running refinement. Cryosparc has been running well for a long time without problem including the refinement, but suddenly got this problem today during refinement. I tried to restart cryosparc, reboot workstations, but still get the same problem. Any suggestion to fix it?
Thanks a lot.

My information:
cryosparc 2.11
CentOS 7
Issue: refinement (Error: cuInit failed: unknown error)

Traceback (most recent call last):
File “cryosparc2_worker/cryosparc2_compute/”, line 78, in
File “cryosparc2_worker/cryosparc2_compute/jobs/refine/”, line 174, in
File “cryosparc2_worker/cryosparc2_compute/engine/”, line 871, in cryosparc2_compute.engine.engine.process
File “cryosparc2_worker/cryosparc2_compute/engine/”, line 25, in cryosparc2_compute.engine.cuda_core.initialize
Error: cuInit failed: unknown error