You're using Versla template and your subscription have expired - support does require a subscription.
You can reposition the mobile menu toggle like this...
.g-offcanvas-toggle {
top: 1rem;
left: 0rem;
}
To create a custom CSS compatible with Gantry 5 please read this
http://docs.gantry.org/gantry5/tutorials/adding-a-custom-style-sheet
.
Remember to recompile CSS from base outline too.
Regards, Mark.