Changing From Http to Https

I bought godaddy ssl month ago on one my website.. Since after, in 1 month, till now, I’m seeing huge traffic drop…
here is my website : https://www.xavixstore.com/how-to-get-free-robux-on-roblox/
Everything is working fine.. No issues with website access..
what could be the reason for huge traffic drop? also keywords drop, Almost 70% drop per day..

The page I need help with: https://www.xavixstore.com/nba-2k18-locker-codes/

The page I need help with: [log in to see the link]