Im having similar issues. After uploading the files via FTP, I get either the 500 error or I just cant see the files all together. It doesn’t make sence to me, as I should still be able to view the files when looking at folders through a webbrowser. Is there some sort of read-only settings that I need to change?
Files which I create and folders that arnt associated to wordpress upload and also view fine. But the moment I add a filefolder from WordPress, the folder views as empty when I refresh the page in a browser??