Hi Sandi,First up, I highly doubt that this is related to the validity
of the Reader Extension credential, nor is that something you even need
to worry about.If one of the signatures is in an unknown state (the
question mark icon) then there is a prompt to warn the next signer that
they are signing a file with signature problems, but it doesn't prevent
signing from occurring. Let's get some background information to help
figure this out.First up, do you know what application is being used
(e.g. ...