Subcommands throw Unsupported Operation Exception

[thiccaxe]

Description

any subcommand of luckperms except help throws a Unsupported Operation Exception.
full stacktrace:

luckperms user
[10:56:27 ERROR] [luckperms-command-executor] Exception whilst executing command: [user]

java.lang.UnsupportedOperationException: null
        at java.util.AbstractList.remove(AbstractList.java:167) ~[?:?]
        at me.lucko.luckperms.common.command.CommandManager.execute(CommandManager.java:252) ~[?:?]
        at me.lucko.luckperms.common.command.CommandManager.lambda$executeCommand$1(CommandManager.java:166) ~[?:?]
        at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1800) [?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) [?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) [?:?]
        at java.lang.Thread.run(Thread.java:831) [?:?]

Reproduction steps

run luckperms [subcommand not help|h] in console

Environment details

Using build 2, and Sabre commit [adf2656],