Kozel

I had mis-read your post thinking it was a problem with the Mission Editor.
But the problem is with the script readers.
Hunter had the same one so I made a patch.

Use this download link to get the "ScriptPlayerSU.exe" installer program

Script reader set-up

Run the "ScriptPlayerSU.exe" in your UAW160 Multiplayer 2020 folder.
It will add a "2020PlayerV5.exe" but before you can use it you must open the "Script Player SetUp" folder.
Inside it there is a "setup.exe" and you need to run it.
Install it anywhere, but do not let it overwrite newer files with older ones.

When it is finished you can run the "2020PlayerV5.exe" to load existing multiplayer scripts.