All it says in the uploader is http error (nothing else)
Developer tools says;
Path: async-upload.php/wp-admin
Method: post
Status: 500 Internal Server Error
Type: Text/html (which seems confusing as it’s an image)
The images themselves anywhere from 250px up to 1024px on the largest side
from 17kb up to 600kb in size.
Some are jpg some are png.
I have a folder of about 20 images that I have been trying to get on, sometimes they all fail, sometimes 5 or six, sometimes one. Doesn’t matter if I bulk upload or do them as single images. It’s never the same ones that fail or succeed either so it’s not a corrupt file issue.