White line at the top of the composer pushes the left menu down

White line at the top of the composer pushes the left menu down

After opening the TagDiv composer, a white line at the top appears and it pushes the page down, including menu. It results in disappearing of the menu items on the left menu, the black strip with undo button to be more precise.

I tried;
1. to disable “Show Toolbar when viewing site” in User > Profile menu
2. view the composer in full screen (menu automatically adjusts)
3. hide the Windows task bar automatically (menu automatically adjusts)
4. change Window’s display settings
5. Downgrade the Newspaper theme from 12.7.4 to 12.7.3

None of them worked.

I’d appreciate some help. I’m a beginner with no technical background, so please keep it simple as much as possible.

Thank you!

https://drive.google.com/file/d/1-1656M-mIvaqxN1aZ7CV50L3qvxBZApD/view?usp=drive_link

P.S. I’d also be glad if someone tells me how to create pages which look like exactly posts. When I try to start a new, my header menu and footer overlaps and I can’t fix it.

Hello Calin,
Thank you for your reply. I had one extra plugin installed, Forminator, and disabling it fixed the problem. Thank you!