I have Group Manager installed on my server, and I just created the groups.yml file. When I try to use commands in the game, it says that all the commands are disabled due to an internal error. I checked the file in a YAML validator, and it says it is fine, but Minecraft just won't accept it. I really don't know what is wrong with it. If anyone could help, that would be awesome. Here is the link to the groups.ylm file: https://pastebin.com/wkuxvyyJ I found the error. It's fixed now. EDIT by Moderator: merged posts, please use the edit button instead of double posting.