I started a CIDER session and it said that a connection has been established. But when I run SPC m s s I get a message that says No cljs REPL in current session

Okay after switching buffer to a clj file instead, it opens the repl buffer just fine.

Where do I define Clojure, CIDER's version? In the .lein/profiles.clj?

I get these warnings in the REPL

"Clojure, CIDER's version?" -- do you mean "what version of Clojure is used by CIDER"? AFAIK, there shouldn't be any need to specify that. When you say, "I started a CIDER session", what specific command did you run?

@eggsyntax I meant to say where do I define the clojure and cider versions

Cider sessions => SPC m s i