Failure to Re-train segmentation_nuclei with QuPath

Hi,

I’m verifying re-training with model built in MONAI Label (segmentation_nuclei) with Pathology App and QuPath.
I want to run segmentation with adding a new class, so I set class “Test” to annotation (as attached).

After I submit the labels, run training, I found error in terminal of MONAI Label Server.

And it seems that result of next inference didn’t reflect my re-training.

I think submitting labels was appropriately done (as attached).

Could you give some advice what caused this failure and what should I do to improve?

Best regards,