Subject: RE: bug#45090: 28.0.50; tabulated-list-mode: cannot activate button

From: Drew Adams <[email-masked]>
Date: Sun, 6 Dec 2020 18:22:55 -0800 (PST)

This is what Michael H was trying to get across in
[email-masked]: Don't quote the things
inside the list.

(setq tabulated-list-entries 
      '((1 ["Something"
            ("Button"
             action (lambda (b) (message "Hello"))
             font-lock-face link 
             follow-link t)])))

The doc string tells you that a DESC has a label:
in your case "Something" and properties and their
values.  Nothing is evaluating any of those things,
since they are in your quoted list ((1...)).