Describe the issue:

i am build the nni whl with source code, then install it, but when i test the case in NNI/examples/trials/mnist-tfv2/config.yml, it report error
Environment:

• NNI version:2.9
• Training service (local|remote|pai|aml|etc): local
• Client OS: centos
• Server OS (for remote mode only):
• Python version:3.7
• PyTorch/TensorFlow version:2.9
• Is conda/virtualenv/venv used?: no
• Is running in Docker?: yes

Configuration:

• Experiment config (remember to remove secrets!):
• Search space:

Log message:

• nnimanager.log:
• dispatcher.log:
• nnictl stdout and stderr:

[root@dcunode5 home]# nnictl create --config NNI/examples/trials/mnist-tfv2/config.yml
[2023-04-19 06:25:21] Creating experiment, Experiment ID: 6kl8eicb
[2023-04-19 06:25:21] Starting web server...
[2023-04-19 06:25:22] WARNING: Timeout, retry...
[2023-04-19 06:25:23] WARNING: Timeout, retry...
[2023-04-19 06:25:24] ERROR: Create experiment failed
Traceback (most recent call last):
File "/root/miniconda3/bin/nnictl", line 8, in
sys.exit(parse_args())
File "/root/miniconda3/lib/python3.7/site-packages/nni/tools/nnictl/nnictl.py", line 497, in parse_args
args.func(args)
File "/root/miniconda3/lib/python3.7/site-packages/nni/tools/nnictl/launcher.py", line 91, in create_experiment
exp.start(port, debug, RunMode.Detach)
File "/root/miniconda3/lib/python3.7/site-packages/nni/experiment/experiment.py", line 135, in start
self._start_impl(port, debug, run_mode, None, [])
File "/root/miniconda3/lib/python3.7/site-packages/nni/experiment/experiment.py", line 104, in _start_impl
self.url_prefix, tuner_command_channel, tags)
File "/root/miniconda3/lib/python3.7/site-packages/nni/experiment/launcher.py", line 148, in start_experiment
raise e
File "/root/miniconda3/lib/python3.7/site-packages/nni/experiment/launcher.py", line 128, in start_experiment
Experiments().add_experiment(
File "/root/miniconda3/lib/python3.7/site-packages/nni/tools/nnictl/config_utils.py", line 109, in init
self.lock = get_file_lock(self.experiment_file, stale=2)
File "/root/miniconda3/lib/python3.7/site-packages/nni/tools/nnictl/common_utils.py", line 125, in get_file_lock
return SimplePreemptiveLock(path + '.lock', stale=stale)
File "/root/miniconda3/lib/python3.7/site-packages/nni/tools/nnictl/common_utils.py", line 98, in init
self._lock_file_name = '{}.{}'.format(self._lock_file, os.getpid())
AttributeError: 'SimplePreemptiveLock' object has no attribute '_lock_file'

How to reproduce it?: