If seeing the error `Please check mosaic_position_model_path!`, make sure the there is a model file at `./pretrained_models/mosaic/mosaic_position.pth`
If you see the error `Please check mosaic_position_model_path!`, check if there is a model file named `mosaic_position.pth` at `./pretrained_models/mosaic/mosaic_position.pth`