npcs trade window not working in tfs 0.3.6 8.54

[Mixlort]

npc swap windows do not work in these new v8 versions, I used a version from last year, very old on my server and it worked normally, if we take the updated client executables and play in the old client in which it worked the bug appears, the same thing when using the brand new client, which indicates that the problem is in the source
I'll leave the error logs here, these problems happen as soon as you say "hi", "trade"

packet.log