I would like to restore a backup but here is the error message

Odoo 12 - Ubuntu 16.04 (update ok)

Database restore error: Postgres subprocess ('/usr/bin/pg_restore', '--dbname=name', '--no-owner', '/tmp/tmp1l00rept') error 1

on the page web: Internal Server Error The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.