Okay, I'm not sure at all if this will help or not but I had a similar issue with a script I was using and heres how I fixed it.
Search the script for images and find where its calling the image from- In my case, it was calling an image from a non existent folder so I just created that folder and took a random image and named it the same as the missing image and everything worked. The image I used was just something I placed in paint.net and renamed and its not even showing up in my game so I have no idea why it even needed an image there...Originally I thought it would show that image in place of the missing file so if the file was a missing firearm or something (for instance) I could identify and properly replace the missing image...But evidently nothing was really missing =/
I was getting a 501 error, missing image 9600 () or something crazy when I tried to load the game.
So try going to line 16408 and see if that image or path is even there, if not just create something to match it (or try deleting that area of the script but that didnt work for me with my problem)
BTW I'm a noob at scripting and this has been my first time messing with it (within the last week) so I'm just pasing along how I fixed one of my issue but I dont really have a clue.