How to setup and run phpPgAdmin in OpenServer 5.2.8?

Question

open server

There is Win 10 x64 and OpenServer 5.2.8.
The server settings are as follows:

In php.ini, the php_pgsql.dll extension is enabled:

When you try to start phpPgAdmin, warnings are issued (this seems to be normal), but the interface of phpPgAdmin itself is not displayed, only a white/blank page:

There is no information about errors in the logs:

Tell me, what could be the problem?

Answer 1

and what does he write about deprecated?