Don't know why, but in my "spare time" I snoop around Babel. So I've
revisited Groovy in Babel and have found a bizarre situation where, yes,
there appears an ob-groovy.el in my ~/.emacs.d/elpa/org-9.6/ , but I have
to do a specific load-file to get it seen and functioning. And no, it's not
because of a naming issue in my

 (org-babel-do-load-languages
     (quote org-babel-load-languages)
     (quote ((emacs-lisp . t)
                  (groovy . t)
                   ...
                  )))

form. I've renamed it apache-groovy and it errored out specifically not
finding ob-groovy.el. But again, if I don't specifically load the org-9.6
ob-groovy.el, I get "can't find program groovy" upon block C-c C-c.

-- 
⨽
Lawrence Bottorff
Grand Marais, MN, USA
borgauf@gmail.com