AttributeError: 'NoneType' object has no attribute 'get' when running local experiment

I have set up fuzzbench on my WSL. The `make presubmit` process executed successfully.
However, after creating the configuration yaml file provided in the documents for running local experiments, when trying executing run_experiments.py, the process ended up with the error below:
```
Traceback (most recent call last):
File "experiment/run_experiment.py", line 569, in
sys.exit(main())
File "experiment/run_experiment.py", line 555, in main
start_experiment(args.experiment_name,
File "experiment/run_experiment.py", line 228, in start_experiment
config = read_and_validate_experiment_config(config_filename)
File "experiment/run_experiment.py", line 79, in read_and_validate_experiment_config
local_experiment = config.get('local_experiment', False)
AttributeError: 'NoneType' object has no attribute 'get'
```
The verson of WSL is `Ubuntu 20.04 LTS`, and the python version is `python3.8.10`.