Thank you Ciaran for the perfect assistance and help!

Hello Ciaran,
any suggestion?
thank you so much!

Hello Vento

As you appear to have a single image in your header have you considered placing an image in the showcase-1a module position using a Custom module? In this way the full image will be displayed on all devices. Remember you can remove the padding from the showcase positions via the Module Widths tab of your template settings.

Ciaran

Hello Ciaran and thank you for your support!
For the moment I am using just one image on the header, but I hope to use it like a slideshow in the future. Anyway your solution is good in case I just want to use it always alone... and in case I can't fix it I will follow your advice.
However, there is no solution to delete it or adapt it to the screen on mobile devices? Maybe with a CSS code?
Many thanks!

My sincere apologies as we appear to have missed your reply.

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.

Ciaran

Thank you Vento

I have installed and setup a simple slideshow module which should be better suited to your needs.

Ciaran

Thank you Ciaran,
so what can I do with this robots.txt? which page can not you see why blocked by this?
Many thanks and wish you a nice day

ps. I wrote to your email address to get support! Thanks