Disc quota issues on Lucia can lead to uninformative generic error message. One can check with:

dd if=/dev/zero of=foo bs=10M count=1

See also https://doc.lucia.cenaero.be/system_description/storage_details/

• check if setgid is set https://doc.lucia.cenaero.be/files_permissions/setgid/

chmod g+s /gpfs/home/acad/ulg-gher/abarth

Install MELPA and ELPA in emacs:

• Emacs error failed to verify signature archive-contents.sig...

see https://emacs.stackexchange.com/questions/233/how-to-proceed-on-package-el-signature-check-failure

Content of .emacs

(setq gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3")
;; comment this out after installing the emacs package: gnu-elpa-keyring-update                      
(setq package-check-signature nil)
(require 'package)
(add-to-list 'package-archives '("gnu" . "http://elpa.gnu.org/packages/"))
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
(package-initialize)