OK, it was CORS. I had it setup with a name where the host should instead of an asterix, thinking this was where I named the config (it is what is in the dropdown list, which is usually a name!) . However there is still a change is so far as the URL in Swagger that my developers will be told to use has still reverted to the IP address and not the domain. Sure I can tell them to just replace the IP with the domain, but is there a reason why the IP address is there in V2 and in 1.9 it was the domain?
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