[Steven Zahm]

Not sure there’s anything I can do about this and a few Google searches do not really lead to much. This lounds the most promising:

https://wordpress.org/support/topic/cant-upload-images-larger-than-128kb-http-error?replies=9#post-2439904

The 2000000 seems to be only 2MB which actually should be more than enough but you know users, they want to upload those multi-megapixel images from their cameras and phones.