I have CA certificate from Let’s Encrypt, I can get to my domain fine from Windows 10 and Mac. All domain variants forward to https://www.example.com. But when I try and access the domain from my phone (Android v: 8.0.0) Samsung S7, using Chrome, I get this really long message. I have already accepted the certificate, so I can’t tell you the exact message, but it’s something like “Couldn’t verify certificate, but it appears valid, gives a brief description of what a CA certificate is suppose to do. press OK to accept certificate” That is the abridged version of the nearly full screen message that appears. I had a friend try it from his phone last night and he is getting the same message.
Now I am not the smartest guy in the world so I need some step by step help because I have never had to troubleshoot a certificate before so I don’t know where any of this stuff is, and what a cert.pem is or anything else really. I have read something that since I have a SAN Cert I might need to break up into 2 smaller files one being a cert.pem and some other. pem file. I also read something like Microsoft has this trick where it will reverse trace a CERT to verify it’s authenticity. I don’t know. I was hoping someone could help me understand how to fix this problem.
My domain is: https://www.example.com
I ran this command: I went to: https://www.example.com
It produced this output: It does a large popup saying it couldn’t verify the key or something like that, and it give me the option to install.
My web server is (include version): IIS 7.5
The operating system my web server runs on is (include version): Windows Server 2008 R2, completely updated. I have SSL and TLS available.
My hosting provider, if applicable, is: N/A