About data format

[hyalvin]

Hello, thanks for your nice work!
But when I use this project following the README file, I got an ERROR saying Expected bytes, got list, any suggestions to solve this? I guess it's something wrong with my coco-format dataset, but actually I can run normally using other detectron2-based projects like AdelaiDet when specify INPUT.FORMAT='bitmask' in the config file, so I just don'k know if there is any differences of dataset format between those projects and yours.
Much Appreciated!
Alvin