Issues Uploading Images

I found a thread regarding issues with uploading images, but there did not appear to be a resolution so I am starting a new thread as I am in desperate need of help! I am receiving the “post processing of the image failed…” error message when attempting to upload photos. I have done many things in an attempt to troubleshoot, but please note I am totally an “amateur” blogger and I have very basic skills!

I have cleared my cache/browsing history
I have reviewed all of my plug-ins and verified they are all up-to-date
I have attempted to upload the photos by going through “Media -> Add New” as well as from within the Media Library.
I have also attempted to upload an image from within a new blog post.

None of these things have fixed the issue. The photos I am attempting to upload are over 2500 pixels, but this has never been an issue for me before. I have previously uploaded photos with well over 6k pixels, no problem.

If anyone has ANY advice on how to fix this, I would greatly appreciate it! I have new blog posts that I have to get published and feel that I am essentially dead in the water at this point.

Thanks in advance for any help/tips/etc. you can provide.

-Shannon