Vantage Premium theme search icon not showing on desktop computer webbrowsers?

Hello SiteOrigin

Denmark calling.
Hi I am Jesper, I am a webdesigner
from the old days before CMS was invented
fighting wih HTML 3.2 in Internet Explorer 3 and Netscape 2!
I normally work with Adobe DreamWeaver and Adobe Muse
and all the rest of Adobe apps.
So WordPress is rather new for me and what a mess!
ha ha ha ha.

I am on a 4 week internship as webdesigner helping the company
correcting some things on their websites.

We have:
www.gjtransport.dk
www.bionor.dk
www.cheminor.dk
I was given a to-do-list to edit and correct the sites.

All of them is a WordPress 4.7.2 site
and has s SiteOrigin Vantage Premium theme running
v.2.5.4 on them all.

The problem I am asking about is
that on one of the sites the search and menu icons
is not showing.
On bionor.dk and cheminor.dk the icons is working OK
But NOT on www.gjtransport.dk

On my iPhone with iOS v.10.2.1
the search icon and menu icons
shows up as they should in Safari browser.
No problems.

But they are not showing on Desktop computers.
Like I am sitting on a Window 7 SP1
and testing in web browsers:
– Google Chrome v.55.0.2883.87
– Firefox v.51.0.1
– Opera v.42.0.2393.517
– Internet Explorer v.11.0.9600.18537

I have screenshots if you like them send to an e-mail address?

Please tell me how I can correct this problem?????

Kind regards
Jesper