I try to get a user token via the REST-API (authorize). When I approve the OAuth request I get an error 400 (invalid request). On the error page are links to login, signup or generate token; they are all broken and lead to an 404 error. I think something with the enterprise configuration is broken. The links lead to <url>/arcgis, but the webadaptors are server and portal. Is it possible that I have to update the links?