Certificate Verification Error on Ethereum Ropsten chain


I try to verify the certificate on www.blockcert.org, and encountered an error which says
“Transaction occured at time when issuing address was not considered valid.”
I refer to the discussion the post " Verifier - Checking authenticity [FAIL] "

I use github to store my issuer.json(use create-issuer in cert-tools), the access to files is all OK. And I also modified the issuer’s create time to one day earlier than the creating time.

However, the same error info is still there.
Could anyone please help give some advice to fix the problem?

Thanks for your help.

Check out this recent post, apparently a recent change fixes that issue: