We’ve suspended player trading in Diablo IV until further notice due to a gold and item duplication exploit. We are working on a fix to amend this issue and will update you once we’ve reinstated the ability to trade. Once that is done, we will continue to monitor this activity to ensure a healthy playing experience for all. As always, any account that engages in gold and item duplication exploits will be actioned in accordance with our End User License Agreement. We thank you for reporting this...
Reminds me of New World. That was full of exploits and each time the devs blocked trading, sometimes for days at a time.