Google Play Store won't download app

Play Store downloads successfully first chosen app, but it get stuck on downloading the second one. There is no error message. Only activity I see is notification of content waiting to be downloaded. Solution is to reboot the phone.

Here is a screenshot that shows kind of notification I am writing about, since I am unable to provide an actual one. No error messages, just a continuous progress bar:

I tried clearing cache, then all data and then data in Google Play Services app, but it didn’t help. The phone is Oukitel U11 Plus, using Android 8.

I have visited wiki page of google-play-store tag and didn’t found any reasonable advice in regard of this situation.

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On the side note, one other frustrating thing is happening, too. When searching in Chrome it redirects to local .rs domain, but it then prints out err_tunnel_connection_failed. I got around it buy using no redirect link to force it to go main .com domain.