TLDR;

  1. Invite the bot to your server with this link. Make sure that Crayon has the listed permissions.
  2. Make sure that the role Everyone has the permission Use External Emotes in the Channel you want to use Crayon.

Adding Crayon to your server

To add Crayon to your server, an administrator of your discord server has to use this link. Accept the given permissions, as they are required.

Crayon adds the existing commands as Slash-commands, which means you can use them in any channel. You can remove the permission to use Slash-Commands from individual channels.

Due to an issue with Discord Interactions, the role Everyone needs the permission to Use External Emotes. Otherwise, Crayon will not be able to display perk emotes.