I think the code line 402-403 in openpsg/utils/utils.py is error
if out_file is not None:
mmcv.imwrite(output_viz_graph, osp.join(out_dir, '{}.jpg'.format(i)))
It myabe
if out_dir is not None:
mmcv.imwrite(output_viz_graph, osp.join(out_dir, '{}.jpg'.format(i)))