I've been having issues to trade tf2 keys, if i make a trade for example a craft hat for 1.33 ref the trade works just fine, but if the trade involves tf2 keys it simply fails.
Also trade offers involving tf2 keys say this: There was an error sending your trade offer. Please try again later.
This has been happening to me since yesterday and since i'm mostly a game trader this issue has stopped all of my trades. Some help would be appreciated.