Minecraft 1.20.5 has changed the command output structure, so most commands will no longer work for 1.20.5+.
An update is being worked on, but it will take some time as every tool needs to be updated and quite a number of changes have been made by
Mojang. In the meantime, you can use the previous version of Minecraft (1.20.4) to use the commands. Working on this issue is the top priority.
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Try the Commands Troubleshooting and Help page if you get stuff with server errors.
Suggestions or found a bug
Leave me a comment/like on:Minecraft Versions Permalinks
If you find yourself using a particular version all the time, you can link directly. There is some crossover between versions, so there will be quirks.