Go to web guard
And need to tap to activate the protection 
Next page is a button at the bottom of page said "allow now"
Redirect to list of apps in my phone and then nothing else can done
No any buttons to confirm or activate the guard 
at bottom of page only a (...) more and left arrow at top left to go back
nothing else
I tap the arrow and back, still not activated 
Any guide to activate this? Phone type is Xiaomi 17T
Thanks