CypressError cy.then() timed out after waiting 4000ms. Your callback function returned a promise that never resolved. The callback function was:

import { OktaAuth } from '@okta/okta-auth-js'

Cypress.Commands.add('oktaLoginApi', (username, password) => {
    cy.request({
        method: 'POST',
        url: `https://${Cypress.env('okta_domain')}/api/v1/authn`,
        body: {
            username,
            password
        },
        headers: {
            "Content-Type": "application/json",
            "Accept": "application/json"
        }
    }).then(({ body }) => {
        const user = body._embedded.user
        const config = {
            issuer: `https://${Cypress.env('okta_domain')}/oauth2/default`,
            clientId: Cypress.env('okta_client_id'),
            redirectUri: 'http://localhost:3000/login/callback',
            scope: ['openid', 'email', 'profile'], // TODO: look into 
        }
        
        const authClient = new OktaAuth(config)
        cy.log("hello"+authClient.token)

        return authClient.token
            .getWithoutPrompt({ sessionToken: body.sessionToken })
            .then(({ tokens }) => {
                const userItem = {
                    token: tokens.accessToken.value,
                    user: {
                        sub: user.id,
                        email: user.profile.login,
                        given_name: user.profile.firstName,
                        family_name: user.profile.lastName,
                        preferred_username: user.profile.login,
                    },
                }
                window.localStorage.setItem('oktaCypress', JSON.stringify(userItem))

                log.snapshot('after')
                log.end()
            }, error => {
                console.log(error)
            })
    })
})

giving error

CypressError
cy.then() timed out after waiting 4000ms.

Your callback function returned a promise that never resolved.

The callback function was:

({
body
}) => {
const user = body._embedded.user;
const config = {
issuer: https://${Cypress.env('okta_domain')}/oauth2/default,
clientId: Cypress.env('okta_client_id'),
redirectUri: 'http://localhost:3000/login/callback',
scope: ['openid', 'email', 'profile'] // TODO: look into

};
const authClient = new _oktaAuthJs.OktaAuth(config);
cy.log("hello" + authClient.token);
return authClient.token.getWithoutPrompt({
sessionToken: body.sessionToken
}).then(({
tokens
}) => {
const userItem = {
token: tokens.accessToken.value,
user: {
sub: user.id,
email: user.profile.login,
given_name: user.profile.firstName,
family_name: user.profile.lastName,
preferred_username: user.profile.login
}
};
window.localStorage.setItem('oktaCypress', JSON.stringify(userItem));
log.snapshot('after');
log.end();
}, error => {
console.log(error);
});
}

Because this error occurred during a before each hook we are skipping the remaining tests in the current suite: OktaLearn more

absolutely no idea why

Does your Okta org definitely have a Default authorization server? If you go to https://oktadomain/oauth2/default/.well-known/openid-configuration, do you get an error message or do you get a list of endpoints and scopes, etc, supported by that server?