ProxoReborn SSL certificate verification error

[referrer]

Hey guys, I keep getting a proxoR ssl certficate verification error when visit
https://forum.palemoon.org/
or
https://www.solidot.org/

The pop window shows

Code:

---- Certificate Errors ----
SSL Verify: [3:10] certificate has expired
SSL Verify: [2:10] certificate has expired

---- Certificate Info ----
CN=*.palemoon.org

Begins:    2020-02-24 00:00 GMT
Expires:    2021-12-01 23:59 GMT

These started about two week ago I guess.
Is this a bug or something else and how can I fix this.