BUG #16105: trying to install pgadmin4

The following bug has been logged on the website:

Bug reference:      16105
Logged by:          johannes janssens
Email address:      johannes.janssens@yahoo.com
PostgreSQL version: 11.5
Operating system:   debian buster
Description:

# wget -O - https://www.postgresql.org/media/keys/ACC4CF8.asc | sudo apt-key
add -
--2019-11-09 10:36:54--  https://www.postgresql.org/media/keys/ACC4CF8.asc
Herleiden van www.postgresql.org (www.postgresql.org)... 217.196.149.50,
72.32.157.230, 87.238.57.232, ...
Verbinding maken met www.postgresql.org
(www.postgresql.org)|217.196.149.50|:443... verbonden.
HTTP-verzoek is verzonden; wachten op antwoord... 404 Not Found
2019-11-09 10:36:54 Fout 404: Not Found.

gpg: no valid OpenPGP data found.