Farouk Kaddu
Here is the quick solution, read further below to dive deeper into the the problem…
1. Download new ISGR Root X1 Certificate from:
2. Double click downloaded file to install the certificate.
3. Search for ‘X1’ certificate and double click it
4. CLick on ‘Trust’ dropdown link
5. Find “When using this certificate”: Select “Always Trust”
If you are running into this error:
NET::ERR_CERT_DATE_INVALID
Problem: On Sept 30th 2021 lets encrypt phased out the old DST Root CA X3 (and it’s R3 intermediate) and replaced it with the new ISRG Root X1 Certificate.
This left tens and millions of websites stack with old certificate. Older imacs and PC’s couldn’t update to new certificate hence running into the error above.
It really is annoying but certainly no one’s fault, this fix will buy us more time before we can buy new macs macbook pros 🙂