clojure.tools.nrepl ERROR

Exception in thread "nREPL-worker-0" java.lang.IllegalArgumentException: No implementation of method: :send of protocol: #'clojure.tools.nrepl.transport/Transport found for class: clojure.tools.nrepl.middleware.load_file$wrap_load_file$fn$reify__668
	at clojure.core$_cache_protocol_fn.invokeStatic(core_deftype.clj:568)
	at clojure.core$_cache_protocol_fn.invoke(core_deftype.clj:560)
	at clojure.tools.nrepl.transport$eval175$fn__176$G__166__183.invoke(transport.clj:16)
	at clojure.tools.nrepl.middleware.interruptible_eval$evaluate$fn__657$fn__672.invoke(interruptible_eval.clj:122)
	at clojure.main$repl$fn__7417.invoke(main.clj:260)
	at clojure.main$repl.invokeStatic(main.clj:258)
	at clojure.main$repl.doInvoke(main.clj:174)
	at clojure.lang.RestFn.invoke(RestFn.java:1523)
	at clojure.tools.nrepl.middleware.interruptible_eval$evaluate$fn__657.invoke(interruptible_eval.clj:87)
	at clojure.lang.AFn.applyToHelper(AFn.java:152)
	at clojure.lang.AFn.applyTo(AFn.java:144)
	at clojure.core$apply.invokeStatic(core.clj:646)
	at clojure.core$with_bindings_STAR_.invokeStatic(core.clj:1881)
	at clojure.core$with_bindings_STAR_.doInvoke(core.clj:1881)
	at clojure.lang.RestFn.invoke(RestFn.java:425)
	at clojure.tools.nrepl.middleware.interruptible_eval$evaluate.invokeStatic(interruptible_eval.clj:85)
	at clojure.tools.nrepl.middleware.interruptible_eval$evaluate.invoke(interruptible_eval.clj:55)
	at clojure.tools.nrepl.middleware.interruptible_eval$interruptible_eval$fn__702$fn__705.invoke(interruptible_eval.clj:222)
	at clojure.tools.nrepl.middleware.interruptible_eval$run_next$fn__697.invoke(interruptible_eval.clj:190)
	at clojure.lang.AFn.run(AFn.java:22)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)