ERROR akka.io.TcpListener - Bind failed for TCP channel on endpoint

Problem

You get a warning message in Site Admin - "An important update failed"

And have this error in your ErrorLog:

ERROR akka.io.TcpListener - Bind failed for TCP channel on endpoint [/0.0.0.0:8090]

Cause

Port conflict on your Windows Server.

Solution

Edit the file C:\GpsGateServer\Franson NMEA Service\GpsGate.Service.exe.config

Add the following line inside the <appSettings> tag:
<add key="MessageStorePort" value="4567" />

Stop and Start the Service again under Site Admin > Service.