Connected but doesn't work. Error msg in output

It prompted “connected to nRepl” but all evals don’t work. I found many error msgs in the output window of nRepl: Here are a few of them:

nREPL server started on port 60953 on host 127.0.0.1 - nrepl://127.0.0.1:60953
Exception in thread "nREPL-worker-0" java.lang.ClassCastException: nrepl.transport.FnTransport cannot be cast to clojure.tools.nrepl.transport.Transport

...
Exception in thread "nREPL-worker-1" java.lang.ClassCastException: nrepl.transport.FnTransport cannot be cast to clojure.tools.nrepl.transport.Transport
	at cider.nrepl.middleware.track_state$make_transport$reify__6508.send(track_state.clj:186)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
...

ERROR: Unhandled REPL handler exception processing message {:ns examples.core, :op info, :symbol append}
java.lang.IllegalArgumentException: No implementation of method: :send of protocol: #'clojure.tools.nrepl.transport/Transport found for class: nrepl.transport.FnTransport

Not sure what is happening here?

[avli]

Usually I connect to a running nREPL in the VSCode terminal (Ctrl+backquote) with lein repl :connect localhost:<port>, where <port> is the port you can see in the status line of the editor.

[Huxpro]

@avli Thx! That works nicely! BTW, what’s the proper way to do “Interaction with REPL”? May I able to eval the whole buffer and open the nREPL connected side-by-side in the VSCode like emacs? Otherwise, I might have to write things in code then run Eval and show result then delete it after seeing the result. That doesn’t sound a very productive workflow.

Thanks again!