By the looks of your comment, you have an uncaught exception in your application. That’s an indication you or a dev needs to fix something in the app. Cypress is just trying to tell you.
If you want to ignore the error, you can add this to your test
it('Access URL', () => {
cy.once('uncaught:exception', () => false);
cy.visit('URL')
cy.wait(5000)
cy.get('.login-btn').click()
})
If you want to ignore uncaught exceptions in ALL tests you can add this to your support file. (I do NOT recommend this, I recommend fixing your application to find out why it’s throwing an exception in the first place)
// support/index.js
Cypress.on('uncaught:exception', () => false);