Door codes not working

Hi we have reports from our player base that they cant open any boxes and the pass through codes above the door are always incorrect.

The dungeon npc drops a note with a code if you lucky (sometimes)

We do not have custom loot but when we tested i had one of them drop a note which opened a door, but none of the others dropped one. also i couldnt open the little boxes so could not proceed furhter

Is there a short text tutorial or similar we can post in our DC to help players?

Hi, let's try to figure out your problems one by one. Describe in detail one of the most important problems, please make screenshots so that I can definitely understand

were you able to solve the problem?