[adamcanady]

Apparently this isn't the same Krebs as https://krebsonsecurity.com/ [0]

[0] Funny enough, the website has a broken SSL cert at the time of writing.

[lostcolony]

Expired an hour ago from the time you posted.

[tialaramex]

It has expired. A nice example for why shorter lifetimes encourage a healthier approach to renewals with better monitoring and so on.

Krebs has a (now expired) certificate from Sectigo (were Comodo CA) but with a long lifetime. There's a good chance that it was so long ago nobody remembered it needs to be periodically renewed.