[Python] NEAT-Python: "Missing configuration item: compatibility_disjoint_coefficient" error...

I'm using the NEAT-Python library and trying to run a simple configuration with the following config file:

[NEAT]
fitness_criterion = max
fitness_threshold = 1000
pop_size = 10
reset_on_extinction = False

[DefaultGenome]
num_inputs = 6
num_outputs = 4
num_hidden = 0
feed_forward = True
initial_connection = full

activation_default = sigmoid
activation_options = sigmoid
aggregation_default = sum
aggregation_options = sum

[DefaultSpeciesSet]
compatibility_threshold = 3.0
compatibility_disjoint_coefficient = 1.0
compatibility_weight_coefficient = 0.5

[DefaultStagnation]
species_fitness_func = max
max_stagnation = 5
species_elitism = 1

[DefaultReproduction]
elitism = 1
survival_threshold = 0.2


But when I run my code, I get this error:

raise RuntimeError('Missing configuration item: ' + self.name)
RuntimeError: Missing configuration item: compatibility_disjoint_coefficient


As you can see, compatibility_disjoint_coefficient is present in the [DefaultSpeciesSet] section. I'm not sure why NEAT is throwing this error.

Any ideas what might be causing this?

P.S. i loaded using

local_dir = os.path.dirname(__file__)
config_file = os.path.join(local_dir, 'config-feedforward.txt')
run_neat(config_file)


and

def run_neat(config_path):
config = neat.Config(
neat.DefaultGenome,
neat.DefaultReproduction,
neat.DefaultSpeciesSet,
neat.DefaultStagnation,
config_path
)


I have checked the file naming and path

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