Sorry Liam,
but whothedaddy is right. I just tested this out for myself on PC V1.07 without editing anything and I also get an Unknown Function. I used developer mode to highlight the error:
Unknown Function
Player = get_players();
Also, although I cannot yet promise, I should be able to record this for you and link you the video to add to the thread
Update: After fixing the previous Unknown Function, I have come across another:
Unknown Function
self EnableInvulnerability();
...