Why does Google Play Store not allow me to download anything?

[AC Question]

My phone is a Samsung Galaxy J1 powered by Android. One day, I checked my phone and everything was gone. I searched: show disabled apps, and I got everything back. But now I cannot see the weather on my home screen (it usually does) and I've tried everything to put it back. I tried changing my wallpaper but there is an error. But the most important thing is, Google Play Store, when I try to download something, says: Unable to download due to unknown error: -110.

Please help me. I cannot download anything and I've tried everything.

Thanks.
Kda2o