According to the Entrust revocation list for the Entrust L1M CA
http://www.entrust.net/customer/crl_form.cfm Certificate issued by L1M with serial number 1BDA21F20CD791160000000054CDC61A has been revoked.
Revocation Date: Thursday, December 7, 2017 5:00:17 AM +00:00
Revocation Reason: Superseded