Psql: error while bash install

after run
bash <(curl -fsSL 186db18e7bf84a-04fbe6521a5421-17462c6c-100200-186db18e7c0811
i got

firezone-postgres-1  | running bootstrap script ... ok
firezone-postgres-1  | performing post-bootstrap initialization ... ok
Resetting DB password...
psql: error: connection to server at "", port 5432 failed: Connection refused
	Is the server running on that host and accepting TCP/IP connections?

where’s the problem an how can i fix it?
i use ubuntu 20.04

you can restart the postgres container and it works