What could be the problem of the inability to install or update applications through Google Market?

Question

Android

Hello dear users! There was a little strange (for me) situation. When you try to update or install the application on your phone (I have MI 5), on the phone of other people (someone has Explay Neo or Samsung A3), nothing comes out, and sometimes it can even write "search for a Wi-fi network". Applications are downloaded and updated perfectly through other networks or through the mobile Internet. I don’t really understand why exactly Wi-fi, which is at home, does not make it possible (it happened quite suddenly, because a few days ago everything was fine, and I didn’t climb in the router settings). Also, the network through the phone, for example, for the use of applications (rewriting via messenger or the like) works fine. I erased the data (cache, etc.), relinked accounts - it didn’t help (and I already said

Answer 1

Perhaps your ISP staged a mitm attack on Google's infrastructure for you personally? In Russia, this is now the norm.
What happens if you try to go to https://play.google.com from your phone