Android NullPointerException in onResponse Method: Troubleshooting Guide

The error message indicates that a 'NullPointerException' occurred in the 'onResponse' method of the 'YD' class, specifically at line 20 in the 'YD.kt' file. This 'NullPointerException' could be caused by trying to access or use a variable or object that is 'null'.

Additionally, the error stack trace shows that the exception was thrown during the execution of a Retrofit callback, specifically in the 'DefaultCallAdapterFactory$ExecutorCallbackCall$1$1.run' method.

To fix this issue, you need to check for null values and ensure that all required variables or objects are properly initialized before using them in the 'onResponse' method.