Fails to build with openapi-core

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Install with python:

pip install openapi-core==0.18.0

Example code:

with open(file, "r") as f:
    spec = Spec.from_file(f)

File "/home/.venv/lib/python3.11/site-packages/openapi_core/spec/paths.py", line 27, in from_dict
    validator.validate(data, base_uri=base_uri, spec_url=spec_url)
  File "/home/.venv/lib/python3.11/site-packages/openapi_spec_validator/validation/proxies.py", line 34, in validate
    raise err
openapi_spec_validator.validation.exceptions.OpenAPIValidationError: {'type': 'string', 'description': 'The symbol of the faction.', 'minLength': 1, 'enum': ['COSMIC', 'VOID', 'GALACTIC', 'QUANTUM', 'DOMINION', 'ASTRO', 'CORSAIRS', 'OBSIDIAN', 'AEGIS', 'UNITED', 'SOLITARY', 'COBALT', 'OMEGA', 'ECHO', 'LORDS', 'CULT', 'ANCIENTS', 'SHADOW', 'ETHEREAL'], 'examples': ['COSMIC']} is not valid under any of the given schemas

Failed validating 'oneOf' in schema['properties']['components']['properties']['schemas']['patternProperties']['^[a-zA-Z0-9\\.\\-_]+$']:
    {'oneOf': [{'$ref': '#/definitions/Schema'},
               {'$ref': '#/definitions/Reference'}]}

On instance['components']['schemas']['FactionSymbols']:
    {'description': 'The symbol of the faction.',
     'enum': ['COSMIC',
              'VOID',
              'GALACTIC',
              'QUANTUM',
              'DOMINION',
              'ASTRO',
              'CORSAIRS',
              'OBSIDIAN',
              'AEGIS',
              'UNITED',
              'SOLITARY',
              'COBALT',
              'OMEGA',
              'ECHO',
              'LORDS',
              'CULT',
              'ANCIENTS',
              'SHADOW',
              'ETHEREAL'],
     'examples': ['COSMIC'],
     'minLength': 1,
     'type': 'string'}