java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke "java.util.concurrent.ExecutorService.execute(java.lang.Runnable)" because the return value of "com.velocitypowered.api.plugin.PluginContainer.getExecutorService()" is null
        at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315) ~[?:?]
        at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320) ~[?:?]
        at java.base/java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:791) ~[?:?]
        at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
        at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:405) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at java.base/java.lang.Thread.run(Thread.java:840) [?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "java.util.concurrent.ExecutorService.execute(java.lang.Runnable)" because the return value of "com.velocitypowered.api.plugin.PluginContainer.getExecutorService()" is null
        at com.velocitypowered.proxy.event.VelocityEventManager.fire(VelocityEventManager.java:540) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at com.velocitypowered.proxy.event.VelocityEventManager.fireAndForget(VelocityEventManager.java:520) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at com.velocitypowered.proxy.connection.backend.TransitionSessionHandler.lambda$handle$0(TransitionSessionHandler.java:155) ~[proxy.jar:3.4.0-SNAPSHOT (git-cefa3b27-b450)]
        at java.base/java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:787) ~[?:?]
        ... 9 more