In Google Analytics we're trying to add a property for each website of a WordPress multisite network. It works well for all of the sub-site but one. In the Default URL field we used the following:

• www.mywebsite.no/ - works
• www.mywebsite.no/nurse - works, as does a few other sub-sites
• www.mywebsite.no/doctor - doesn't work

In the last case we get the following error:

Value is not a valid domain. (e.g. example.com, www.example.com)

We can't change the name of the sub-site but GA just won't accept the URL. Why is this and what can we do to solve this?