index.vue?400f:878 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'code')

This error means that you are trying to access a property called 'code' on an object that is undefined. This can happen if you are trying to access a property of an object before it has been properly initialized, or if the object was not created at all.

To fix this error, you should check that the object exists before trying to access its properties. You can do this using an if statement or the optional chaining operator (?.). For example:

if (myObject && myObject.code) {
// do something with myObject.code
}

// or

const code = myObject?.code;
if (code) {
// do something with code
}

By doing this, you can avoid trying to access properties on undefined objects and prevent this type of error from occurring.