Comment (by Roland Haas):

I get the same bad certificate issue (Firefox, Linux, not at LSU). This is also the topic as the “Need config info for cactuscode.org vs www.cactuscode.org” conversation with Sai Pinnepalli at LSU (there should be emails from around May 10th):

Websites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for cactuscode.org. The certificate is only valid for the following names: lsu.edu, *.lsu.edu

Error code: SSL_ERROR_BAD_CERT_DOMAIN

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2536/certificate-for-https-cactuscodeorg-is-not