Referenced OpenAPI document does not validate

[ChristopherKraemer]

In reference to the readme OpenAPI document http://sysml2.intercax.com:9000/docs/, using an OAS validator openapi-generator.tech fails

In order to reproduce:

# download openapi-spec.json from link
uv tool install openapi-generator-cli # or other install tool
openapi-generator-cli validate -i openapi-spec.json &> validation.txt

Results in

...
[error] Spec has 62 errors.

attachment has full output:
validation.txt