When running org-timer-set-timer (bound to `;') in an Org agenda buffer,
I get following warning:

⛔ Warning (org-element): ‘org-element-at-point’ cannot be used in non-Org buffer #<buffer *Org Agenda*> (org-agenda-mode)

I tried to understand the code of org-timer-set-timer. It runs
(org-entry-get nil org-effort-property) initially to find the Efforts
property. This in-turn calls org-element-at-point.

I think the solution could be similar to
https://orgmode.org/list/m2leawo9zo.fsf@hazy.com where we go to that
heading first, and then call org-entry-get?

Also, I guess it should check if the buffer is org-agenda-mode or
org-mode before running the org-entry-get.
Is this a good approach? If yes, I would like to come up with a patch for
this.

Emacs  : GNU Emacs 29.3 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0)
 of 2024-03-25
Package: Org mode version 9.7-pre (release_N/A-N/A-b45b39 @ /home/bhavin/.emacs.d/elpa/org-9.7pre0.20240405.140341/)

--