ValueError: not enough values to unpack (expected 2, got 0)

[FocusGZL]

File "/home/focus/github_project/AISFormer/detectron2/modeling/roi_heads/roi_heads.py", line 826, in forward
mask_head_results, instances = self._forward_mask(features, proposals, c_iter)
how to fix the problem? it's so strange.

[hnyang00]

This may be because the parameters were not passed in. Please check the previous code.