Sync button does not work in SharePoint 2013

Hello Guys,

I am working on a SharePoint 2013, Windows 10 and Office 2016, when I tried to sync a document library in the SharePoint, I am diverted to other screens. Please find screens below when I clicked on the button Sync:

when I clicked on Allow button, other screen appears.

When I unchecked the box and clicked the "Look for an app in the Store", it diverts me to another screen.  I am unable to sync my document library.

I already installed OneDrive on my laptop, despite that I am unable to sync my document library.

Please help what should I do in that case?

Thanks.

Bhavnasu