No. It's not a real error. If you fix that something else would pop up. These errors are indicative of a faulty installation (faulty in one of a number of ways: maybe it wasn't on a totally clean 1.2 build, maybe the beta download or the patch download were corrupted or damaged in transit; those are the two big possibilities). This mod *will* work on a clean 1.2 build - there is no doubt about that.