Error when training YOLOv7 in google colab

[alissatataa]

Traceback (most recent call last):
File "/content/gdrive/.shortcut-targets-by-id/1DLUUdl4gqnU9WBtaYeJxXbs0RdhsBB71/yolov7/train.py", line 613, in
train(hyp, opt, device, tb_writer)
File "/content/gdrive/.shortcut-targets-by-id/1DLUUdl4gqnU9WBtaYeJxXbs0RdhsBB71/yolov7/train.py", line 245, in train
dataloader, dataset = create_dataloader(train_path, imgsz, batch_size, gs, opt,
File "/content/gdrive/.shortcut-targets-by-id/1DLUUdl4gqnU9WBtaYeJxXbs0RdhsBB71/yolov7/utils/datasets.py", line 69, in create_dataloader
dataset = LoadImagesAndLabels(path, imgsz, batch_size,
File "/content/gdrive/.shortcut-targets-by-id/1DLUUdl4gqnU9WBtaYeJxXbs0RdhsBB71/yolov7/utils/datasets.py", line 392, in init
cache, exists = torch.load(cache_path), True # load
File "/usr/local/lib/python3.10/dist-packages/torch/serialization.py", line 1384, in load
return _legacy_load(
File "/usr/local/lib/python3.10/dist-packages/torch/serialization.py", line 1628, in _legacy_load
magic_number = pickle_module.load(f, **pickle_load_args)
_pickle.UnpicklingError: STACK_GLOBAL requires str