ok, there is something wrong somewhere.
when I view your navbar_header.html file there is no sign of the code to produce the extra links you have in the navbar.
that should mean that you have one or more extensions installed to produce those extra menu items. however, you do not show any extensions installed that would do it.
so, I wonder if you are showing the list if extensions from the correct board or something.
did you delete any extensions from the ext folder but not properly uninstall them? is your board running under some type of caching system like cloudfare etc?
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OK, so what's the speed of dark?