Symptoms

There are licensing issues or settings aren't applied properly, controller.log has error Failed to connect to master redundancy:

[E 06/000000A3/T0978/P07A4] 11-05-20 15:02:18 - Failed to connect to master redundancy (10.225.25.99).

Cause

The IP address in the properties of the Master Publishing Agent is incorrect.

Resolution

1. Go to RAS Console → Farm → Publishing Agents;
2. Open the properties of the Master Publishing Agent;
3. Click Resolve:

4. Click Apply and reopen the RAS Console.