Hi,
That’s due with limitations if the execution script in GoDaddy. They won’t change that unless you have a dedicated server.
Do like this:
1) open the media library and choose the list display so you can check the current number of media items.
2) Import the Dante demo content, after receiving that 500 error refresh the media library page to see if the number of items has increased if so repeat the process a couple more times till the number of media elements don’t change that means that there is no new image to import.
If you need provide your site url and admin credentials so I can check it.
-Rui