The issue will not be with Selenium but how you are first locating the element and whether or not it exists in the DOM, is visible or interactive.
First you need to test your xpath expression in the browser and make sure it uniquely identifies one element and not multiple. Usually a class attribute returns multiple elements in the same group and selenium wouldn't know what to interact with or will just interact with the first one that is returned in the array and that first element could be hidden or blocked by another.
When you are able to do the first step you then need to analyse the behavior of the element and its surroundings. Once its located it then means its in the DOM but you need to know whether its hidden visually, hidden in an iframe or another element is on top of it.
You will then need to write code to eliminate those issues by making the element visible and that no other element is blocking it. This could involve performing some action on another element to bring the element in question in focus.