Psql: error: connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or directory

Hi,

I have installed DHIS2 lxc containers on my laptop, and Im having some problems to access postgres PSQL. Thaings were working well, but suddenly I starting getting the following error: psql: error: connection to server on socket “/var/run/postgresql/.s.PGSQL.5432” failed: No such file or directory

1. The first time it worked
   root@postgres:~# sudo -u postgres psql
   psql (16.8 (Ubuntu 16.8-1.pgdg22.04+1))
   Type “help” for help.

postgres=# \du
List of roles
Role name | Attributes
-----------±-----------------------------------------------------------
dhis |
postgres | Superuser, Create role, Create DB, Replication, Bypass RLS
root | Superuser

2. Now Iam getting the error:
   

3. This is the postgresql configuration file
   

Looking forward to a solution

Thanks

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