If you don't have the right PAK Files or right hack mechanism it won't work anymore,Sample New Release At 2018-01-18 now!!!!!!! They introduced a checksum in-game in the latest patch. So, obviously, as you modify the paks, you will get a different checksum. And boom, error 25. Odd they aren't yet banning for this, must be because they haven't yet sorted out the false positives.