Hey there mariaaminov,
How are you today?
It appears that the option to add header image is not working. However, you can add header image with some custom CSS. To do that please try adding the following CSS code in the style.css file of your child theme or add it in your site using the following plugin:
https://www.ads-software.com/plugins/simple-custom-css
#header {
background: url(your_image_URL) no-repeat 0 0;
}
Replace the fake image with the actual url of your image. If this doesn’t work could you please post link to your site so I can take a look?
Hope this helps ??
Best regards,
Bojan