Entity related methods in server/world throw exceptions

[umbral tundra]

event.register(
        Commands.literal("kill_items")
            .executes(ctx => {
                var entities = ctx.source.server.getEntities();
                ctx.source.sendSuccess("Completed", false);
                return 1;
        })
    )

[wooden wolf]

Once your ticket has been resolved, please close it with </ticket close:1054771505520717835> command!

[umbral tundra]

For some reason it seems to be throwing exceptions on this line here:
var entities = ctx.source.server.getEntities();

[uneven socket]

Paste version of message.txt from @umbral tundra

[umbral tundra]

I have tried using different variations of filtered versions of this method

I have tried itterrating over worlds manually and trying to get all entities

Every time when I make a call to entity related method in a server/world it just throws exceptions, even though when I looked at other examples of people using this method - everything worked for them

And yet, stuff like ctx.source.server.runCommandSilent and ctx.source.server.scheduleInTicks produces no such errors