Hello
May I suggest sending temporary administration access to your Joomla installation to info@joomla51.com and we will examine this issue further. For our reference please paste a link to this post in your email.
Ciarán
Why you need access to my site? I have explained my problem. The same problem is in localhost.
I have installed only template, without any modules.
https://joomla51.com/forum/magnolia-header-images-problem