HI @aliamirlali8 - hope you're keeping well!
We had a look over the site, and it appears that some changes you may have made via the plugin placeholder settings is wreaking havoc on the ad tester versions of the site.
We're seeing ads that are too large filling in areas of your site where they do not fit properly, and is most likely because the 'position' of these placeholders has been changed.
For example, placeholder 48 and 49 should not be 'under first paragraph' or 'top of page'. These incorrect locations could be allowing ad sizes that should not be used to fill into locations where they become 'too close to clickable elements' or hide text.
Let's have you revert changes to 'location' that you made just as a base to start from.