I cannot connect to WiFi networks that have automatic login pages.

I am using an iPhone X 256 GB and an iPad Pro 256GB both running 11.4.1 and all apps unto date 2 days before, both devices cannot connect to most commercial WiFi networks (e.g. most hotel or airport networks) that have a login page that automatically comes up when choosing the network. At home my WAP2 security WiFi works perfect with these devices. My MacBookPro (early 2015, 2.9 GHz i5, 1 TB SSD) running 10.13.6 can connect to these same commercial WiFi networks no problems by clicking on the wifi icon, choosing network, login window pops up, enter details and I'm connected - YeeHa!

My wife is using a iPhone X and a iPad and both devices work 100%. On her devices, we turn on WiFi > select WiFi network and a login page pops up. On my devices I never get a login page come up. If I go to Safari no login page comes up. I have the WiFi connection icon on, which indicates I am connected, but no internet based application works e.g. safari, email, facebook, speedtest etc

I have been to the Apple Store, they thought it was because I had block pop ups setting on, (turned it off, but still couldn't connect) but when I checked my wife's iPhone, it had the "block pop up's" setting on and she could connect anyway. I then "reset network settings", that didn't work, then I "rest phone setting", still could not connect.

I sync my safari and nearly everything except photos and desktop and documents with iCloud, so I wonder if something in my synced settings is the cause since only my devices are effected?

This problem has been happening for months and months. Please help, Thank You