Unfortunately, due to the fact that the difference between v16 and v21 is very significant, you may receive a lot of random errors, so if I went through how to fix this one with you, another one would just show up. If you do still want to fix it, we can do that
If there are features that you wish to keep in your game through large updates like this, as a general rule, Maruno would have kept the feature in, but called it a different name
I presume this was called from a script within an event command
What does it do?