Failed to load API definition.

Errors
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Fetch error
Failed to fetch https://petstore.swagger.io/v2/swagger.json
Fetch error
Possible cross-origin (CORS) issue? The URL origin (https://petstore.swagger.io) does not match the page (http://dss.forkbomb.eu:8080). Check the server returns the correct 'Access-Control-Allow-*' headers.