Go to top button error

Dear Sir, the Go to top button is not functioning. I have explored all the topic but did not find the solution how to fix it.

However, Scroll to top/go to top button is displaying accurately but it neither the button is functioning properly and neither it hovers. Kindly help me to fix this issue.

(Note: if you are visiting website 1st time then the scroll to top button works but after that, the button stops to work)

I have also reviewed the sydney pro stylesheet css file file but did not find how to fix that , may there is an error in the 1193 row and 2012 row
My website URL is https://www.tiktikhost.com.

Dear Sir!

I have solved this issue. You can closed this request.
Thank You Very Much!