.Net Remoting Manager Service not starting - a4wnetMgrService

SOLVED

In Sage 300 v2021, we have an issue where the .Net Remoting Manager Service is not starting. 

Attempting a manual start results in the error "Windows could not start the Sage 300 .NET Remoting Service service on Local Computer. Error 1064: An exception occurred in the service when handling the control request." 
Even after a running Taskkill in command prompt, the errors persist.  

In the Application Event Log, 3 entries show:  

Level: Error
Source: a4wnetMgrService
Event ID: 0
Task Category: None

Service cannot be started. System.ApplicationException: Could not locate registry entries required by the ACCPAC .NET Remoting Manager Service.
at ACCPAC.Advantage.Server.RemotingManagerService.OnStart(String[] args)
at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(Object state)

Level: Error
Source: .NET Runtime
Event ID: 1026
Task Category: None

Application: a4wnetMgrService.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.ApplicationException
at ACCPAC.Advantage.Server.RemotingManagerService.OnStart(System.String[])
at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(System.Object)
at System.ServiceProcess.ServiceBase.Run(System.ServiceProcess.ServiceBase[])
at System.ServiceProcess.ServiceBase.Run(System.ServiceProcess.ServiceBase)
at ACCPAC.Advantage.Server.RemotingManagerService.Main()

Level: Error
Source: Application Error
Event ID: 1000
Task Category: (100)

Faulting application name: a4wnetMgrService.exe, version: 6.8.0.0, time stamp: 0x5f42c1d2
Faulting module name: KERNELBASE.dll, version: 10.0.17763.4377, time stamp: 0x160cb2f6
Exception code: 0xe0434352
Fault offset: 0x00125432
Faulting process id: 0x33c
Faulting application start time: 0x01d9bafa9d050194
Faulting application path: C:\Program Files (x86)\Common Files\Sage\Sage 300 ERP\a4wnetMgrService.exe
Faulting module path: C:\Windows\System32\KERNELBASE.dll
Report Id: 70b419a0-fb48-4b3e-ad6a-b98520046430
Faulting package full name:
Faulting package-relative application ID:

The Sage 300 .NET Remoting Service service uses the Local System account. 
No Web Deployment Manager Wizard was installed during Web Screens installation.

Any help would be appreciated

Regards