What did I do wrong about this plugin?

I have programmed the following plugin but the Minecraft server does not recognize it… What did I do wrong?

Main:

cmd_gm:

cmd_spec:

cmd_builder:

plugin.yml:

I'm still a beginner and this is my first plugin with "args":)

Thanks in advance for any answer.

The plugin should be a / gm 0 • 1 • 2 • 3.

Once the method "performCommand" is written with "/ command" and not with "command". Personally, I would recommend p.setgamemode () etc. To you.

Otherwise I would add in the plugin.yml still minimum the description to the Commands.

In your plugin.yml is a ü that does not really like it.

Okay I'll try it out this afternoon.

Jo I try it out at noon today.

It worked.