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Blank space on the right and bottom side of live site

Greetings people,
I hope you are having a good day!

So, when I publish my site on some pages there is a blank space on the right side, so site can be scrolled vertically, and I don’t know what causes it. Same thing is for the bottom of every page. Is there a possibility that some one knows what’s happening.

Here is my read-only link and live site link