Cannot read properties of undefined (reading 'dataTable')

This error occurs when you are trying to access a property of an undefined object. In this case, you are trying to access the property 'dataTable' of an object, but the object itself is undefined.

To fix this issue, you need to make sure that the object is defined before accessing its properties. You can do this by checking if the object exists using an if statement or by using optional chaining.

Here's an example using optional chaining:

const dataTable = myObject?.dataTable;

With optional chaining, if 'myObject' is undefined, the expression will short-circuit and assign 'dataTable' as undefined. This way, you avoid the error.

Alternatively, you can use an if statement to check if the object is defined:

let dataTable;
if (myObject) {
  dataTable = myObject.dataTable;
}

By checking if 'myObject' is truthy, you ensure that it exists before accessing its properties to avoid the error.

Make sure to replace 'myObject' with the actual object you are working with in your code.