Media Library broken

The majority of my images (not all) are broken and I am unable to load any new images.

Website: https://innovteched.com

I’ve tried deactivating all plugins. Didn’t work.
I’ve tried changing the file permissions for the wp-content > uploads to 777, didn’t work.
I’ve also tried SCRIPT_DEBUG.

Chrome’s developer tool gives me the following error messages:

Failed to load resource: the server responded with a status of 404 (Not Found) https://innovteched.com/wp-content/uploads/2014/06/roboteers.png

Any help is MUCH APPRECIATED.