The Credential for Signing is Invalid

Hi,

I get the following error information when trying to digitally sign a document using the GlobalSign Personal Sign 2 CA in Adobe Acrobat Pro DC .  I was able to sign yesterday and today when doing so, I get the error "The credential selected for signing is invalid".  I was able to create a "self-signed" digital ID and I had no issue when prompted to sign.  However, I want to be able to sign using a Digital ID from a file issued by trusted certificate authorities.

Please advise on what I need to do get this it fix.