cls.CLASSES or classes should be specified when testing

[JunzheJosephZhu]

Hi, I'm trying to run the test script but encountered this error:
CUDA_VISIBLE_DEVICES=0 python -m torch.distributed.launch --nproc_per_node=4 --master_port=${PORT:-4040} tools/test.py checkpoints/SETR_Naive_ReLeM/SETR_Naive_768x768_80k_base.py checkpoints/SETR_Naive_ReLeM/iter_80000.pth --launcher pytorch --eval mIoU

Traceback (most recent call last):
File "/home/joseph/anaconda3/envs/open-mmlab/lib/python3.7/site-packages/mmcv/utils/registry.py", line 69, in build_from_cfg
return obj_cls(**args)
File "/home/joseph/anaconda3/envs/open-mmlab/lib/python3.7/site-packages/mmseg/datasets/custom.py", line 117, in init
'cls.CLASSES or classes should be specified when testing'
AssertionError: cls.CLASSES or classes should be specified when testing

[JunzheJosephZhu]

I think I solved the issue, I didn't realize this was a fork of mmseg, so I followed the instructions in get_started.md and installed the official version of mmseg