WebCore Error: There was a problem loading your devices

So I would again check that all the items here have been done in order. Again my experience so far is 99.9% of the time this resolves it.

You can try staging.webcore.co also as a site.

If you are sure webcore is installed properly, has hub has been rebooted properly, passwords are correct, there are not two instances of webcore installed, etc. Come back and we can work it in a private message