Certify The Web for Windows Server 2016 Essentials Access Anywhere

Hello,
I’ve set up our server using the very useful guide above but I still have to run anywhere access repair to get the vpn working again after a renewal. If I run the script (unaltered from the example script fro RDPGatewayServices) as a test from within Certify the Web it breaks the vpn so i think there is an issue in it for Essentials maybe?
Any thoughts?
Ps I am an enthusiastic amateur!
Shaun
WSE 2016