Looking at it from a different angle, we can see the error message says you have a ult.gsc file which is referencing a function that does not exist. if you wrote this script, ask for help in the modding section because you messed up something.
If you did not create this script, content the mod creator because they may have messed up something or the script is just out of date and needs updating.
Also, do all the things Resxt told you to do.
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