Issue with header button : how to change a button URL/ahref through custom code ?

Site URL: https://www.takeoffconcept.ch

Hi, 

I've reported an issue to Squarespace which they are apparently aware of. 

I'm actually not able to change the link of my header button through the link box editor (see screenshot). The change just won't apply. In the meantime they are working on this issue, the person on the chat has suggested me to ask for help here. 

Can anyone help me keep the button and force another ahref through custom code ?

Thank you !

Robin

Hi. Have you solved this problem yet?

Also, do you want to align center all elements in footer mobile?

/* center mobile footer */
@media screen and (max-width:767px) {
div#page-section-60156745d5e6a55235d53099 * {
    text-align: center !important;
}
}

One thing I notice is that the URL listed looks odd.

Normal URLs start with "https://". Your is "/https:/www...".