Hi guys! I am new to both emacs and clojure and I don't even know how to approach this. Works on my Ubuntu, but fails on macOS. When trying to do clojure-jack-in i get this:

nREPL server started on port 49486 on host 127.0.0.1 - 
ERROR: Unhandled REPL handler exception processing message {:op clone, :id 1}
java.lang.NullPointerException
	at clojure.core$deref_future.invokeStatic(core.clj:2292)
	at clojure.core$deref.invokeStatic(core.clj:2312)
	at clojure.core$deref.invoke(core.clj:2298)
	at cemerick.piggieback$wrap_cljs_repl$fn__50762.invoke(piggieback.clj:288)
	at clojure.tools.nrepl.middleware$wrap_conj_descriptor$fn__46451.invoke(middleware.clj:22)
	at refactor_nrepl.middleware$wrap_refactor$fn__55864.invoke(middleware.clj:214)
	at clojure.tools.nrepl.middleware$wrap_conj_descriptor$fn__46451.invoke(middleware.clj:22)
	at nrepl.server$handle_STAR_.invokeStatic(server.clj:18)
	at nrepl.server$handle_STAR_.invoke(server.clj:15)
	at nrepl.server$handle$fn__50340.invoke(server.clj:27)
	at clojure.core$binding_conveyor_fn$fn__5476.invoke(core.clj:2022)
	at clojure.lang.AFn.call(AFn.java:18)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

it looks like you have refactor nrepl in your setup. can you try without that?

usually better to get things working as simply as possible and then build back up to it

also, what is your lein version? lein --version?

Leiningen 2.8.3 on Java 1.8.0_202 Java HotSpot(TM) 64-Bit Server VM

@dpsutton I got rid of the refactor from plugins and now I am getting timeout

[nREPL] Direct connection to localhost:49542 established
error in process filter: nrepl-send-sync-request: Sync nREPL request timed out (op clone id 1)
error in process filter: Sync nREPL request timed out (op clone id 1)

can you post your project.clj file or deps.edn file?

oh boy. ok. well you picked a big one to learn. and also at a time when a low level library changed. few things you need to bump: figwheel-sidecar -> "0.5.18"; com.cemerick/piggieback -> cider/piggieback "0.3.10" (yes coordinate change) cemerick.piggieback/wrap-cljs-repl -> cider.piggieback/wrap-cljs-repl

🙂 Thanks. What I really don't get in here is that it works just fine on my ubuntu.

i suspect your ubuntu machine has an older version of lein (2.8.1)

i'm guessing your mac is new and has the latest lein?

Genius!

That indeed is the case!

Thank you