When i am trying to go to resource pages of CS50 like syllabus link
I get untrusted page error by my browsers firefox and opera and cant even make an exception here is the error i get, this has been happening since yesterday wasnt a problem before.
This Connection is Untrusted
You have asked Firefox to connect securely to cdn.cs50.net, but we can't confirm that your connection is secure.
Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified. What Should I Do?
If you usually connect to this site without problems, this error could mean that someone is trying to impersonate the site, and you shouldn't continue.
This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox only connect to it securely. As a result, it is not possible to add an exception for this certificate.
cdn.cs50.net uses an invalid security certificate. The certificate is only valid for the following names: cloudfront.net, *.cloudfront.net (Error code: ssl_error_bad_cert_domain)