Every time I try to create a trade, regardless of what I put into it, I get a 403 error (forbidden). It only happened recently and it doesn't work on either my Steam overlay or on Firefox.
Aug. 24, 2014, 9:30 p.m.
(Last edited by ultrazars on Aug. 24, 2014, 9:31 p.m.)
+1, this sometimes happens to me too, and only when creating new trades (edit works fine). Error message contains something about CSRF token. I will post screenshot what that happens again.
I think this happens when you create a trade with an item that is not currently in your inventory (but you could select it because our caching has problem) - This will hopefully be fixed after our next cache system update.