I've installed WAB 2.11 on our ArcGIS server, along with LocalLayer. It's working except that I'm the only person who can see the services published to ArcGIS Server.
I've gotten someone else to log into the server and start WAB, they still cannot see the layers. They also can't see the layers that they've published to arcGIS server, and the services are set to public, but I can see the layers they have published. the layers are created by loading them into an mxd from SDE and publisdhing. the SDE service is registered with the server.
The WAB is registered with our AGOL account and set to organisational sharing.