figured out a fix
The solution that worked for me was to create an .htaccess file in the wp-admin directory. The htaccess file should have the following rules in it:
AuthType Basic
AuthName share
Satisfy Any
Order deny,allow
Allow from all
<IfModule mod_security.c>
<Files async-upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>
</IfModule>