itext7
How to perform revocation check with iText7?
Why my Pdf certificate status "Revocation checks status were not perform"?
How to perform revocation check with iText7?
Do I need to do this before injecting .p7s into the Pdf?
Solution
Please read the message at the bottom of the dialog:
The selected certificate has errors: Not time valid
Most likely your certificate simply is beyond its validity, check it on the Summary or Details tab.
(The pdf you linked is incomplete.)