On the touch device, header widget block will be hide automatically to make the mobile responsive.
Please check your front page on the touch device.
Header widget will be hide like screenhsot.
So you can't edit the section on the small device width.
You can change the width value which is hide the header widget area.
Please go to the admin->theme options->header. And change the "Mobile layout width" on the bottom of field.
We already set the small value. So you can show and edit the header widget over 992px width.
If you have any other questions, please let us know again.
Best Regards, C-Themes