Solved Why can't I execute plugin commands on the spigot side

[qscbm187531]

Solved
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The plugin commands I wrote can only be used in the console, the player cannot execute them, and the commands of other plugins are all fine.

CommandMeta meta = server.getCommandManager().metaBuilder("mycommand").aliases("mycmd").plugin(this).build();
server.getCommandManager().register(meta,new MyCommand());

public class MyCommand implements SimpleCommand {
@Override
public void execute(Invocation invocation) {
String[] args = invocation.arguments();
if (args.length == 0 || args.length>3 || args.length == 2) {
sendHelp(invocation);
return;
}
// execute
}

@Override
public boolean hasPermission(Invocation invocation) {
return invocation.source().hasPermission("permission");
}