Index 4 out of bounds for length 4

This error message typically occurs when you are trying to access an element in an array or a list using an index that is greater than or equal to the length of the array or list.

For example, if you have an array with a length of 4 and you try to access the element at index 4 (which is the fifth element), you will get this error message because the array only has elements at indexes 0, 1, 2, and 3.

To fix this error, make sure that you are using valid indexes that are within the bounds of the array or list. You can also check the length of the array or list to ensure that you are not accessing elements that do not exist.