The simple act of switching wifi network on off is known to fix the problem of android phone not connecting to wifi network.
Wifi sign up page not showing.
That s only a problem only with open public unsecured wi fi networks.
Tap on settings wifi.
If you connect to an open network at your friend s house say typically you won t need a password and can just start browsing the internet directly.
However when i connect to a public network with login portal and open facebook messenger it gives me a push notification telling me i should finish connecting and when i click that it opens the page that once opened automatically when i connect to that kind of network.
However this may not work all the time and you are out of luck here head over to the next step below.
On the wifi screen make sure that wifi is set to on position and your wifi network shows as being connected see image below.
See if the login page will now come up.
I had the same problem accessing a guest wifi network that automatically loads the login webpage.
In the new page that opens go to the public network settings category and select turn off windows defender firewall not recommended and then click the ok button.
Tracked it down to app permissions in the end after installing firefox it had become default for html but not default for http https.
The trick i found was at the top the screen says login but.
Restart your pc reconnect to the wi fi network and launch your browser.
Sometimes this trick will bring up the wifi authentication portal page.
My samsung a5 suddenly stopped showing a login page automatically instead i have to type 192 168 1 1.
I was getting a blank page when the login screen appeared with no way to sign on to the wifi network.