Reading from breaking-change-load-unload-and-error-removed:
Breaking change: .load(), .unload(), and .error() removed
These methods are shortcuts for event operations, but had several API limitations. The event .load() method conflicted with the ajax .load() method. The .error() method could not be used with window.onerror because of the way the DOM method is defined. If you need to attach events by these names, use the .on() method, e.g. change $(“img”).load(fn) to $(img).on(“load”, fn).
Therefore, you need to change:
$(window).load(function() {});
to:
$(window).on("load", function (e) {})