You triggered something in mod_security which temporarily banned your IP.
Mod_sec can be trigger happy sometimes. However in this case the specific thing that triggered it was this:
If I remember, it's the jquery.cookie.js, I think there is a patch to rename it to jquery-cookie.js or something like that.
Here's what happens - certain words have special meaning to Linux just like ".EXE" or ".COM" are potentially dangerous files on Windows and are totally meaningless in Linux.
For example, if you try to create a folder called "etc" the firewall goes nuts if you try to access it because etc is a very special place under Linux. However, a folder called e-t-c is fine and the firewall will ignore it.