app.tempo.io invalid certificate, SSL_ERROR_BAD_CERT_DOMAIN, Tempo not shown

[Christophe Roos]

In my software project, opening an issue, I get an error message in the Tempo frame:

Your connection is not secure

The owner of app.tempo.io has configured their web site improperly.
To protect your information from being stolen, Firefox has not 
connected to this web site.

app.tempo.io uses an invalid security certificate. The certificate is
only valid for push.prod.netflix.com
Error code: SSL_ERROR_BAD_CERT_DOMAIN

[Christophe Roos · Accepted solution]

The issue turned out to be due to a DNS not being timely updated. Matter closed.