MacOS users see the company splash page, but in the splash page they see the text "this network's admin has prevented you from using the network". I'm the admin, but I didn't prevent it at all.
WPA2 personal with PSK
Associate to APs ok, ping succeeds
Some iPhones receive the same annoying message, they are denied access to internet
All other devices (Android, Windows, ...) don't have this issue.
It must be a MacOS or iOS stuff I should say.