Apparement il n’a pas pu créer le cluster par défaut à cause d’une erreur stupide de locale … (Coucou @ljf , t’avais raison après tout lole …)
2020-08-05 15:56:13,195: DEBUG - Setting up postgresql-11 (11.7-0+deb10u1) ...
2020-08-05 15:56:13,697: WARNING - Error: The locale requested by the environment is invalid:
2020-08-05 15:56:13,697: WARNING - LANG: fr_BE.UTF-8
2020-08-05 15:56:13,698: WARNING - LANGUAGE: fr_BE:fr
2020-08-05 15:56:13,698: WARNING - LC_ALL: en_US.UTF-8
2020-08-05 15:56:13,698: WARNING - Error: could not create default cluster. Please create it manually with
2020-08-05 15:56:13,699: WARNING -
2020-08-05 15:56:13,699: WARNING - pg_createcluster 11 main --start
Du coup je tenterais un pg_createcluster 11 main --start