Cypress could not find any element matching the selector within the timeout period. The element may not exist, may have a different selector, or may not have been rendered yet.
// In your component:
<button data-testid="submit-btn">Submit</button>
// In your test:
cy.get('[data-testid="submit-btn"]').click();data-testid attributes are immune to CSS class changes and text changes.
cy.get('#element').debug();Pauses execution and opens the browser DevTools for debugging the selector.
ObserveOne's self-healing selectors automatically fix broken selectors when the DOM structure changes.
Start Monitoring FreeA Cypress command timed out while retrying. Cypress automatically retries assertions until the timeout, then fails. The default is 4 seconds.
The element that Cypress was interacting with was removed from the DOM and re-rendered. This is common in React/Vue/Angular apps where components re-render.
cy.visit() failed to load the target URL. The server may be unreachable, or the response status code indicates an error.
cy.request() failed because the server returned an error, the connection was refused, or the request timed out.
A Chai assertion in Cypress failed because the actual value did not match the expected value. This is the most common test failure type.