"ERR_CERT_COMMON_NAME_INVALID,"
Sounds to me like something is hijacking the SSL certificate, as mega.nz has a valid certificate from Let's Encrypt
A reddit post from 1 year ago said this:
Vivaldi browser tells me the connection is not secure. NET::ERR_CERT_COMMON_NAME_INVALID
I know Belgian authorities started inserting a fake certificate at the beginning of the year -- I managed to work around that by using Google DNS but it seems to stop working for (some) mega folders.
EDIT :: if there's a logout button visible (briefly), try clicking it. I've just had one work that way.
Try changing your
You must be registered to see the links
, restart your browser and try again.
Edit:
You can also take a look at the certificate by going to mega.nz, clicking the padlock-icon to the left of the URL, then click "Certificate". It should say something like this: