Error: Configuration Wizard won’t connect to a provided server and database.

Problem:

The SQL Server Browser service is not running. When this service is not running you cannot connect on named instances.

Solution:

The SQL Server Browser service needs to be up and running.

  1. Open SQL Server Configuration Manager on your SQL server.
  2. Click on SQL Server Services. Find the SQL Server Browser service, right-click on it and press Start.
  3. New login

  4. Do not forget to allow inbound traffic on TCP Port 1434.