Seems Cursive dropped support for Lein 2.8.1 to support newer versions of nrepl: https://github.com/cursive-ide/cursive/issues/2120 Anyway, I can still get a repl by using the clojure.main repl type, and "Run with IntelliJ Project classpath". Awesome 🙂 Here's hoping Cursive keeps supporting older Clojure versions:crossed_fingers:

Btw in case anyone wonders, I'm trying to use the http://piplin.org/ library, which is unmaintained, and doesn't support Clojure > 1.5 (I think it's partly due to some lisp-macro hackery)

The issue you linked was included in Cursive 1.8.1. So you need Cursive 1.8.0. By expanding the table at https://plugins.jetbrains.com/plugin/8090-cursive/versions/stable we see that the latest matching IntelliJ version is 2018.3.6 Which you can download from here: https://www.jetbrains.com/idea/download/other.html#:~:text=2018.3.6 If you download the tag.gz / zip file, you should be able to run that side by side with you current IntelliJ (and it will auto-downgrade the Cursive plugin in it to 1.8.0 while keeping the current version in your current IntelliJ).

Right, if you want to downgrade Cursive you can install the community edition of IntelliJ in an older version, assuming you’re running IntelliJ Ultimate for most things. Or Toolbox will let you download multiple versions I believe.

The other thing you can do is run a lein REPL on the command line, and connect to it from Cursive using a remote REPL.

Cool, thanks for the inputs! I think I actually managed to upgrade the library to use Clojure 1.11, so that's even neater 🙂