There's a command for /ec where OPs are able to use. But I cannot seem to add the permission node or if there is one to allow normal users to use this command and open the GUI? Thanks

Hello! Sorry I have removed the legacy wiki page which explains all commands and permissions.. I will work on that as soon as possible. For now your can find the permission for the /ec command here: https://github.com/utarwyn/EnderContainers/wiki/Manage-permissions

New Wiki page with the command list here: https://github.com/utarwyn/EnderContainers/wiki/Command-List
If you have any idea on how to improve it, let me know! I close this issue because question as been answered.

Sorry for the long delay! I was not very motivated.