I am able to get WAB Dev to launch in my browser when using localhost:3344/webappbuilder, but not when I try to use machinename.domain:3344/webappbuilder. This is a problem because when I use localhost I cannot connect to my org's AGOL URL (Unable to access, a server with the specified hostname could not be found error). I am led to believe this is because of CORS settings in the admin settings - my app connection has been approved and my machine name added to the list of Allow origins, but localhost has not.
When I try to launch using my machine name I just get a "This site can't be reached" with DNS_PROBE_FINISHED_NXDOMAIN error.
In the item that contains your appId, did you add a redirect URL for your machinename.domain?
I did do that
Is that the same URL as the device name found in the System property page?
Yes it is the same
Finally, what is the URL at the top of the Web Mapping Application section?