V3188. Unity Engine. The value of an expression is a potentially destroyed Unity object or null. Member invocation on this value may lead to an exception.

The analyzer detected dereference of a potentially destroyed or 'null' object. This may cause an exception to be thrown.

Look at the following example:

void ProcessTransform(UnityEngine.Transform transform)
{
  if (transform == null)
  {
    var position = transform.position;
    ....
  }
}

Here, the 'position' property is accessed when 'transform' is either a destroyed object or equal to 'null'. Both options cause an exception to be thrown.

In this case, changing the comparison operator can fix the error:

void ProcessTransform(UnityEngine.Transform transform)
{
  if (transform != null)
  {
    var position = transform.position;
    ....
  }
}