预处理数据集出现如下错误

做预处理数据集时出现如下错误：
E:\Miniconda3\envs\mockingbird\MockingBird-main>python pre.py E:\Miniconda3\envs\mockingbird\MockingBird-main -d aidatatang_200zh -n 1
Ignored unknown kwarg option normalize
Ignored unknown kwarg option normalize
Ignored unknown kwarg option normalize
Ignored unknown kwarg option normalize
Using data from:
E:\Miniconda3\envs\mockingbird\MockingBird-main\aidatatang_200zh\corpus\train
aidatatang_200zh: 0%| | 0/547 [00:00
preprocess_dataset(**vars(args))
File "E:\Miniconda3\envs\mockingbird\MockingBird-main\models\synthesizer\preprocess.py", line 101, in preprocess_dataset
print("Max input length (text chars): %d" % max(len(m[5]) for m in metadata))
ValueError: max() arg is an empty sequence


请大神们给予帮助！！！

Start by running the reported command from pre.py with the aidatatang_200zh dataset path, then inspect models/synthesizer/preprocess.py around the metadata processing and failing max() call. Determine why the run produces zero utterances, frames, and audio timesteps. Done means the dataset is recognized and preprocessing completes without the empty-sequence error.

Written by the indexing model from the issue text.