Hi! I'm new and trying to build my blacklist, but I'm getting an error when trying to blacklist a tag from any post.

Info:
Windows 7 x64
Chrome 38.0.2125.104 m
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36
var version = ["2.97", "141013", "October 13, 2014 8:04 Pm (GMT-5)"]
Line 2411

And the request failure information:

https://e621.net/user/update.json?user[blacklisted_tags]=<tags seperated by %0D%0A>
Request Method:POST
Status Code:500 Internal Server Error
:scheme:https
origin:https://e621.net
Response:
{"reason":"Invalid auth token! If you came here from another site, you were probably just subject to a cross-site request forgery attack!","success":false}

If you need any more info please let me know!
Thanks