This problem occurs when running the script：allennlp.common.checks.ConfigurationError:key 'data_loader' is required

Traceback (most recent call last):
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/common/params.py", line 239, in pop
value = self.params.pop(key)
KeyError: 'data_loader'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/.virtualenvs/bort_test/bin/allennlp", line 9, in
sys.exit(run())
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/main.py", line 34, in run
main(prog="allennlp")
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/commands/init.py", line 94, in main
args.func(args)
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/commands/train.py", line 112, in train_model_from_args
file_friendly_logging=args.file_friendly_logging,
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/commands/train.py", line 171, in train_model_from_file
file_friendly_logging=file_friendly_logging,
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/commands/train.py", line 232, in train_model
file_friendly_logging=file_friendly_logging,
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/commands/train.py", line 423, in _train_worker
params=params, serialization_dir=serialization_dir, local_rank=process_rank,
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/common/from_params.py", line 583, in from_params
**extras,
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/common/from_params.py", line 612, in from_params
kwargs = create_kwargs(constructor_to_inspect, cls, params, **extras)
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/common/from_params.py", line 182, in create_kwargs
cls.name, param_name, annotation, param.default, params, **extras
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/common/from_params.py", line 283, in pop_and_construct_arg
popped_params = params.pop(name, default) if default != _NO_DEFAULT else params.pop(name)
File "/.virtualenvs/bort_test/lib/python3.6/site-packages/allennlp/common/params.py", line 247, in pop
raise ConfigurationError(msg)
allennlp.common.checks.ConfigurationError: key "data_loader" is required
Traceback (most recent call last):
File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
"main", mod_spec)
File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/home/administrator/dont-stop-pretraining/scripts/train.py", line 145, in
main()
File "/home/administrator/dont-stop-pretraining/scripts/train.py", line 141, in main
subprocess.run(" ".join(allennlp_command), shell=True, check=True)
File "/usr/lib/python3.6/subprocess.py", line 438, in run
output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command 'allennlp train --include-package dont_stop_pretraining training_config/classifier.jsonnet -s model_logs/citation_intent_base' returned non-zero exit status 1.

the script is :
python -m scripts.train
--config training_config/classifier.jsonnet
--serialization_dir model_logs/citation_intent_base
--hyperparameters ROBERTA_CLASSIFIER_SMALL
--dataset citation_intent
--model roberta-base
--device 0
--perf +f1
--evaluate_on_test