Laptop Rarely Detects Wireless Network Login/Redirect Pages
System Prefs > Network... set to automatic, using DHCP. If that's what you already have set, then go to Advanced > DNS, select each custom DNS server &amp; hit the - key.

There is usually little point to using anything other than the DNS servers allocated by your ISP or any hotspot. Custom DNS is usually a short-term fix for local server issues, not a long-term alternative.