Yaml Reference to external url not working

[PratMoha]

I'm using a yaml reference in oas which is failing to create mock with below reference.

Error:
      $ref: 'https://opensource.zalando.com/restful-api-guidelines/models/problem-1.0.1.yaml#Problem'

Is prism rely on json reference only and not yaml reference?

Current Behavior

Failing with below error:

{
  stack: 'ResolverError: Error downloading https://opensource.zalando.com/restful-api-guidelines/models/problem-1.0.1.yaml \n' +
    'RequestInit: Expected signal ("AbortSignal {\n' +
    '  eventEmitter: EventEmitter {\n' +
    '    _events: [Object: null prototype] {},\n' +
    '    _eventsCount: 0,\n' +
    '    _maxListeners: undefined,\n' +
    '    Symbol(shapeMode): false,\n' +
    '    Symbol(kCapture): false\n' +
    '  },\n' +
    '  onabort: null,\n' +
    '  aborted: false,\n' +
    '  reason: undefined\n' +
    '}") to be an instance of AbortSignal.\n' +
    '    at download ({PATH}\\node_modules\\@stoplight\\prism-cli\\node_modules\\@stoplight\\json-schema-ref-parser\\lib\\resolvers\\http.js:175:11)',
  code: 'ERESOLVER',
  message: 'Error downloading https://opensource.zalando.com/restful-api-guidelines/models/problem-1.0.1.yaml \n' +     
    'RequestInit: Expected signal ("AbortSignal {\n' +
    '  eventEmitter: EventEmitter {\n' +
    '    _events: [Object: null prototype] {},\n' +
    '    _eventsCount: 0,\n' +
    '    _maxListeners: undefined,\n' +
    '    Symbol(shapeMode): false,\n' +
    '  eventEmitter: EventEmitter {\n' +
    '    _events: [Object: null prototype] {},\n' +
    '    _eventsCount: 0,\n' +
    '    _maxListeners: undefined,\n' +
    '    Symbol(shapeMode): false,\n' +
    '    _eventsCount: 0,\n' +
    '    _maxListeners: undefined,\n' +
    '    Symbol(shapeMode): false,\n' +
    '    Symbol(shapeMode): false,\n' +
    '    Symbol(kCapture): false\n' +
    '  },\n' +
    '  onabort: null,\n' +
    '  aborted: false,\n' +
    '  reason: undefined\n' +
    '}") to be an instance of AbortSignal.',
  source: 'https://opensource.zalando.com/restful-api-guidelines/models/problem-1.0.1.yaml',
  path: null,
  toJSON: [Function: toJSON],
  name: 'ResolverError',
  toString: [Function: toString]
}

Expected Behavior

Accepts the yaml file

Steps to Reproduce

1. Add zalando external reference for testing to any yaml oas and run prism mock command.

• Version used: prism : 5.14.2, node: v24.4.1
• Environment name and version:
• Operating System and version (desktop or mobile): Windows

[PratMoha]

@XVincentX ,

Could you please check if this error? Blocking the automation process for our mocking.

[PratMoha]

Hi Team,

Any update on this issue?

@pytlesk4 @radzserg