I am having trading issues very often in Team Fortress 2. I get a message stating
Your Inventory Is Not Available At This Time in the area where your items are then quickly closes and says:
"Oh nooooooes! Sorry, some kind of error has occurred: The trading session has expired."
Any help would be appreciated as I trade on a regular basis.
(I have tried restarting Steam, my PC and TF2. It has been going for a few days)
I have sent a Ticket but that might not be answer for a few days.