This issue also occurs porting to mac: If its the same issue I have a potential solution: (Disclaimer I'm not a computer person)Did you ever find a fix for this? I have the same problem.
I cannot upload but the issue is that one of the scripts requires a plugin: MP_SET_OUTER_MOVIE (basically a script to call files from a directory outside the movie directory(folder))
Go onto a script editor and control find MP_SET_OUTER_MOVIE
and change the script MP_SET_OUTER_MOVIE to MP_SET_MOVIE (As this command default draws from the movie folder by default)
Also whilst doing this: you may need to delete the path and extension of the file (e.g. img/movies/op_name_input.webm -> op_name_input)
The files that need this script changed are as follows (in the data folder):
(you can check if it works for you by just doing the change above to Map003 which is the intro movie that plays starting a new game -> open the game to see if there's an error or if its fixed)
Map003.json
Map008.json
Map009.json
Map041.json
Map062.json
Map075.json
Map114.json
Map123.json
Map145.json
Map147.json
Map148.json
Map153.json
Map157.json
Map164.json
Map165.json
Map176.json
Map210.json
Map252.json
Map258.json
Map270.json
Map280.json