So AFAIU there is no direct conflict between elfeed-org and org-tempo,
that conflict is apparent only in my full init.el configuration (and
package set) and probably is related to a combination of environment and
init.el configuration.

I'm going to investigate more and see what I can do to sort out things.

Happy hacking! Gio'


[1] https://gonewest818.github.io/2020/03/a-standalone-init.el-for-emacs-package-debugging/

-- 
Giovanni Biscuolo

Xelera IT Infrastructures