The icons and text in the menu is all of a sudden white and mostly not visible. I dont know if I changed something without knowing what I did. But I pretty sure I havent change any setting to white.

Hi there.

Could you check if details to access your back-end are valid?

this issue caused this file templates/shape5_vertex/css/bootstrap/bootstrap-dark-overrides.css, and you need delete this code :

a.btn {
color:#FFFFFF !important;
}

a.btn-primary, a.btn-info, a.btn-success, a.btn-warning, a.btn-danger, a.btn-inverse {
color:#FFFFFF !important;
}

Ok, Ill try to delete that. But why is the code there? I cant remember activating any override.

ehm I think that code come from this template shape5_vertex