Resolve Angular error ERROR TypeError: Cannot read property ‘someProperty’ of undefined

To resolve the Angular error `ERROR TypeError: Cannot read property ‘someProperty’ of undefined`, you need to make sure that the object you are trying to access is not undefined. This can happen if the object has not been initialized yet, or if it has been destroyed.

Here are some things you can do to resolve the error:

• Check if the object is initialized. If you are trying to access the object in the constructor of a component, make sure that it has been initialized before you try to access it. You can do this by using the `ngOnInit()` lifecycle hook.
• Check if the object is destroyed. If you are trying to access the object after it has been destroyed, you will get this error. Make sure that you are not trying to access the object after it has been destroyed.
• Use the `?` operator. The `?` operator is a nullish coalescing operator, which means that it will return the value of its left operand if it is not `null` or `undefined`. Otherwise, it will return the value of its right operand. You can use the `?` operator to check if the object is undefined before you try to access its properties.

Here is an example of how to use the `?` operator to check if the object is undefined before you try to access its properties:

const myObject = undefined;

const someProperty = myObject?.someProperty;

if (someProperty) {
  // Do something with the someProperty property.
} else {
  // The someProperty property is undefined.
}

If you are still getting the error after checking the above, please provide more information about your code and the error message you are getting.