Shop text suddenly gone

Site URL: https://www.ironflagpublication.com/cart

Hi There,

I need help to troubleshoot what happened to my shop. I got a call from a customer yesterday about not being able to check out in our shop. It looks like all tekst is suddenly disappeared or set to white. As you can see in the screenshots you can mark the text, but not see it.

Only thing we have done recently is that we did a test last week, where we sat a password on the shop and then removed it shortly after.

Hope anyone can help with this.

Thanks
Mikkel