disappearance of sidebar in posts after deleting Quora comment plugin

Hello, I was installed Quora wordpress commenting plugin and after a time i uninstalled it resulting disappearance of my sidebar in posts. Sidebar is still visible on homepage, tags, categories but disappear in posts. When i reinstall said plugin sidebar in posts visible as usual. I don’t want to use Quora commenting. What is the solution? Theme i am using is mystique.
My website is getintopc

Hi there

Hope you are having a good day and thank you for your question :slight_smile:
Its not our theme installed on your website
Colorlib Support Team