discuss.answer
It shows for me. Are the compress_js and compress_css System Settings off? What happens when you delete the error log?
You could also try deleting all files in the core/cache directory and using incognito or private mode in your browser. Sometimes a bit of JS from an older version gets stuck in the MODX or browser cache.
If the file is too big to display, MODX normally shows an alert and suggests that you download it. You may run into the issue again if it gets big enough. It could be a bug in 2.3.5 or it could just be caused by leftover stuff in your cache.