I’ve had the exact same thing happen before and just restarted. That link from emacs.stackexchange worked perfectly for me. (I’m on 26.3 emacs, 10.14.6 (Mojave) macos for reference)

Can you export the clojure formatting rules so they can be inspected and shared on a per project basis? I says here https://github.com/syl20bnr/spacemacs/tree/master/layers/%2Blang/clojure#features it uses cljfmt, and that says you can customize it. But can you export the default settings? I need to find a way to set up projects so that multiple editors (intillji, vim, etc) can all have comparable formatting rules. And newcomers have a starting point for comparison if they want to use another one. actually it says you can customize lein-cljfmt. But im guessing thats not what emacs with cider uses?