Please watch this video then setup your malduino as new, see the links in the sidebar.
Chances are your malduino is using a different keyboard layout than the computer you're trying to run on. To fix this on a lite when downloading a script via the converter select the correct language of the computer you'll be running on. Then extract the lite folder, and open the sketch inside of it, proceed to upload this to your lite. To fix this on an Elite, you'll need to use the converter to download a script, any script, selecting the keyboard language prior to download, then extract the elite folder and upload it's containing script to your elite.
If you still get this problem and your script contains special characters and you're using an elite then use the converter to convert your script, this will turn all the special characters in your script to alt-codes which will make them readable by the interpreter on your malduino elite. Alt-codes are only compatible with windows so there is not yet a solution for mac/linux computers unfortunately.
The script you are trying to upload is too big for your malduino, you need to shorten it somehow.
Please see https://help.maltronics.com