Here is the solution, just incase it happens to anyone else.
1. Make a .htaccess file in your /wp-admin/ directory.
2. In the .htaccess file, add the following lines of code:
HTML Code:
<IfModule mod_security.c>
SecFilterInheritance Off
</IfModule>
How do I make a .htaccess file?
1. Make a .txt
2. In the .txt put the code above.
3. Upload it to your server, and then rename it to ".htaccess" (without the quotes).