Error installing Xabber server - can not connect to postgres database

[OOOlledj]

Trying to install Xabber server with postgres database, but it is not successful during configuring in web interface :

Installation failed. Can't connect to database. Maybe you enter wrong data.

Database is running on docker with exposed port 5432. I did everything according to Wiki, but still got the message, and i have no idea what the problem is, because Xabber server does not write any logs during installation.

database: xabber_server_db user: xabber_server_user I'm absolutely sure the password is correct, because it works perfectly on psql CLI client and dbeaver with created user and db.