After looking into this I realized I was selecting a project root that didn't have a valid `deps.edn` file and so `cljojure-lsp` was failing. So the solution is to be sure to select a project root with a valid `deps.edn`/`project.clj`/etc. This will depend on the type of project you're working on.

I still have to point out the fact that (in my case) Spacemacs did not show the function/command being executed that was resulting in an error, which is why it kept showing that Retry/Ignore dialog.