What is the meaning of the error "Null check operator used on a null value" that is caught by a gesture exception in ontap?

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The "Null check operator used on a null value" error occurs when trying to access a variable or property that is null using the "!" operator, which asserts that the value should not be null. This typically happens when code assumes that a certain value is not null but fails to properly handle cases where it is.

In the context of a gesture exception in onTap, this error suggests that there is a problem with the code that handles the tap event. It may be trying to access a null value related to the gesture, such as the position of the tap or the object that was tapped, using the "!" operator without properly checking if the value is null first.

To fix this error, the code should include proper null checks and handle cases where the expected value is null. This can involve using conditional statements, like if-else blocks, to handle different scenarios and ensure that the code does not attempt to access null values using the "!" operator.