2D classification error after Import Particles form WARP

2D Classification
1

After Import Particles from WARP, 2D Classification ended with error:
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 53, in cryosparc2_compute.jobs.class2D.run.run_class_2D
File “cryosparc2_compute/particles.py”, line 38, in init
assert n.all(n.abs(self.data[‘blob/psize_A’] - self.psize_input) < 1e-4 ), “All particles must have the same pixel size to within 10^-4 Angstroms”
AssertionError: All particles must have the same pixel size to within 10^-4 Angstroms

Any help/advice, please.

Thanks.
Katja