:TypeError: Cannot read properties of undefined (reading 'getSimplifiedGeometry')

This error message indicates that you are trying to access the property 'getSimplifiedGeometry' on an object that is undefined. This could happen if you are trying to call a method on an object that has not been properly initialized or if the object does not exist.

To fix this error, you need to make sure that the object you are accessing exists and that it has the property 'getSimplifiedGeometry'. You can do this by checking for null or undefined values before accessing the property, or by making sure that the object is properly initialized before calling any of its methods.