message: Use default popup URI.
diff: @@ -736,7 +736,7 @@ function signInOrSignUpBox (dom, setUserCallback) {
  signInPopUpButton.addEventListener('click', () => {
  var offline = offlineTestID()
  if (offline) return setUserCallback(offline.uri)
  - return solidAuthClient.popupLogin({ popupUri: $SOLID_GLOBAL_config.popupUri })
  + return solidAuthClient.popupLogin()
  .then(session => {
  let webIdURI = session.webId
  // setUserCallback(webIdURI)
  