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This error may occurred when some of components can't be dumped by js-yaml. Please make sure all objects in your components can be stringified or have toJSON() implemented.

YAMLException: unacceptable kind of an object to dump

For example, you may accidentally export a Promise rather than a () => Promise. The former is an Object and can't be stringified, while the latter is a Function and its return value can be flattened.

async function createApp() {
return [new Deployment(), new Service()];
// Don't
module.exports = createApp();
// Do
module.exports = createApp;