Logout.html page. How to make it when user is logged out?

Hi everyone. I have RB 951 as hotspot. Autentification is - trial 30mins. So users have sequencing like - Android: Came into cafe, turning on wi-fi settings chooses my SSID…waiting for message what he can connect to wifi network - click on it, got splash page (login.html). After 30mins user have two options. 1 - He go to link like google.com and got login.html again 2 - he need to reconnect to me SSID. On IOS - User go to Wi-fi settings - connecting - got splash page, got login.html. 30mins passed - same moves like with android.
The thing is if user goest to google.com he will got login page if he goes to (as an example) https://www.google.com.ua/search?q=best+hotspot+ever&oq=best+hotspot+ever&aqs=chrome..69i57.13629j0j8&sourceid=chrome&es_sm=93&ie=UTF-8 He get an error on his browser.

In mikrotik manual i found this “logout.html - logout page, shown after user is logged out. Shows final statistics about the finished session.” But it’s not works for me. after log message “logged out session timeout” there is no logout.html page on my IOS Windows and android devices.

So the question is - how i can make some thing for notify user what he need to go to google.com to use internet? Or automatic redirect to login.html?