I published a script, but when the players play the script, it is missing some of its media

This can occur if your using the exclamation point in any of your filenames or folder names. For instance…

C:!testtest.jpg
C:testing!test.jpg
C:testingtest!.jpg

Scala recognizes the exclamation point as a special character (specifically a variable), and does not include any artwork that uses it. The workaround is not to use the exclamation point when working with file or folder names.