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Margin issues on right side of page - only tablets and mobile device

Hi guys!
I am a beginner in the quest of web page excellency, and recently have found issues with my page in breakpoints from tablets and down to mobile. When loading page it fits perfect to the screen, but when scrolling, the with seems to have a white margin to the left. I have tried to locate if I have defined margins to the right in any box and navbar, but it seems to be none. What may be the problem, or the solution?

Please have a look at some screenshots.

Hope this is a quick fix. Thank you for responding!

Here is my site Read-Only: