Running script_error

Hey @gordonberman ! I just found your script and trying to run it, but when I tried to run the example script I run in this error. Any idea to solve it?

Subscript indices must either be real positive integers or logicals.

Error in findAllImagesInFolders (line 14)
    if folderName(end) ~= '/'

Error in runExample (line 15)
imageFiles = findAllImagesInFolders(filePath,'.avi');