Describe the bug
when oping the trade screen to any npc it will freeze and crash in a matter of seconds.

To Reproduce
Steps to reproduce the behavior:

1. get an npc and place it down
2. give it any trade like 1dirt for 1dirt
3. try to open the trading screen to trade
4. See error

Expected behavior
To see the trade screen for it to work as normal

Screenshots
If applicable, add screenshots to help explain your problem.

Debugging
Before reporting a issue please enable the debug mode over /easy_npc debug true to get more
detailed information about the issue in the logs.
Additionally check if there is anything relevant in the crash-reports, debug.log and latest.log
file.

Is the issue happening in combination with other mods? (If yes, please provide a full list)
no
Additional context
none

This seems a duplication of #145.
Please check if the version 4.3.3 works as expected, if not please add the corresponding crash log to this bug report. Thanks.