No such file or directory: 'configs/mask_rcnn/mask_rcnn_r50_caffe_fpn_mstrain-poly_3x_coco.py'

[RMNT]

Going through a tutorial I encountered this error:

Traceback (most recent call last):
  File "/home/raminta/mmdet-rfla/../PROJECTS/Raminta/mmdet/main.py", line 40, in <module>
    model = init_detector(config, checkpoint, device='cuda:0')
  File "/home/raminta/.local/lib/python3.10/site-packages/mmdet/apis/inference.py", line 53, in init_detector
    config = Config.fromfile(config)
  File "/home/raminta/.local/lib/python3.10/site-packages/mmengine/config/config.py", line 455, in fromfile
    lazy_import is None and not Config._is_lazy_import(filename):
  File "/home/raminta/.local/lib/python3.10/site-packages/mmengine/config/config.py", line 1651, in _is_lazy_import
    with open(filename, encoding='utf-8') as f:
FileNotFoundError: [Errno 2] No such file or directory: 'configs/mask_rcnn/mask_rcnn_r50_caffe_fpn_mstrain-poly_3x_coco.py'

How to resolve it?