Why can I not use the "or"-function

[Ilyes512]

It seems like the "or" function cannot be used (anymore)?

/usr/src/spectral # spectral lint openapi-petstore.json --verbose
Error running Spectral!
Error #1: Function is not defined
          at validateFunction  …tors/function.ts:27  return new RulesetV…
          at validate26        …ompile/index.ts:171  const makeValidate …
          at validate15        …ompile/index.ts:171  const makeValidate …
          at validate14        …ompile/index.ts:171  const makeValidate …
          at apply             …alidation/ajv.ts:84  return Reflect.appl…

It's documented and I see code references. I am using the latest (docker) version.