Nest js Swagger UI not loading

Question

in the browser I'm getting this error and the UI is not loading enter image description here.

This is my swagger document config (main.ts)

const config = new DocumentBuilder()
  .setTitle('Truffles API')
  .setDescription('Truffles API description')
  .setVersion(DEFAULT_VERSION)
  .addTag('Truffles')
  .addBearerAuth()
  .build();

console.log(config);

const document = SwaggerModule.createDocument(app, config);

SwaggerModule.setup(`${basePath}/docs`, app, document, {
  swaggerUrl: `${basePath}/docs-json`,
});