UPDATE
The issue has been resolved. I had to tweak the .htaccess a little more and when I moved the following code to the top of the .htaccess file it works:
<IfModule mod_security.c>
<Files async-upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>
</IfModule>
I put that code at the very top of the .htaccess file, right beneath the # BEGIN WordPress.
Thanks for the help!
Thanks for the link, but unfortunately, I tried everything there and on the outside site and it is still not working.
It uploads the image then throws the “HTTP error” while crunching the image. The thing that really confuses me is that is worked perfectly the first two times I uploaded images, then hasn’t worked since.
Thanks for the help, though!