Trying to navigate too https://electronics.meta.stackexchange.com/ for me ends up with my browser (Firefox) throwing a site certificate error. Adding a exception then results in a 403 error page:
https://electronics.stackexchange.com/ works but has the usual 'some stuff not secure issue' (so images etc). Normal https://electronics.meta.stackexchange.com/ works as well.
N.B. I am using the HTTPS Everywhere addon, so it tries to use HTTPS when possible.