Header error on homepage

Hi

I started using your plugin yesterday, I am using the Modal setting here:

https://www.zdswebdev.co.uk/the-global-recruiter-uk-industry-awards-2018/#1516797356613-cb17c564-bcc3

When your plugin is activated I am getting an error in my header on the homepage, my logo is dropping downwards and there is a big gap:

https://www.zdswebdev.co.uk/

However on all of the other pages there is no gap, for example:

https://www.zdswebdev.co.uk/uk-europe/

But when I then disable the plugin the homepage header works as normal.

Do you know what the problem is?

Thanks
antonmh

The page I need help with: [log in to see the link]