A blank page after logging to TWX Composer

Hi to all.
When I connect to TWX by typing "localhost" in the web address field - everything works fine. But if typed "<local hostname>" I see a blank page. ThingWorx asks me credentials in both ways.

<local hostname> = demoiot

 Windows 10

Java 1.8.0_92(64)

Tomcat 8.5.23 [tomadmin/
PostgreSQL 9.4.21
ThingWorx Platform 8.3

Some more info:

pg_hba.conf

host all all 0.0.0.0/0 trust
host all all ::/0 trust

postgresql.conf

listen_addresses = '*'

\webapps\manager\META-INF\context.xml

comment strings

<!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"
allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
<Manager sessionAttributeValueClassNameFilter="java\.lang\.(?:Boolean|Integer|Long|Number|String)|org\.apache\.catalina\.filters\.CsrfPreventionFilter\$LruCache(?:\$1)?|java\.util\.(?:Linked)?HashMap"/>
-->

platform-settings.json

"PersistenceProviderPackageConfigs": {
  "PostgresPersistenceProviderPackage": {
    "ConnectionInformation": {
      "jdbcUrl": "jdbc:postgresql://demoiot:5432/thingworx",
      "password": "ptc",
      "username": "twadmin"
     }
  }
}

What is a problem?

Many thanx

P.S. I was typing "localhost" in all fields where it was needed while I was installed TWX and 3rd-party software.

pgAdmin III works fine with "demoiot:5432" server name.