AOSignのICカート電子証明書における署名について

すべてのPDFファイルで、署名ができない状態となっています。また、別のPDFファイルでは、レポートのコード（2013、4000）などの警告が表示されます。

Hi there

Hope you are doing well, and thanks for reaching out. 

"This document does not contain content that may affect the visual integrity," means that the document's visual elements (like text, images, etc.) are stable and not likely to change unexpectedly during operations like digital signing.

The issue you are experiencing with using the digital certificate from the card is this occurring with a particular PDF file or all the PDFs? Please try with a different PDF file and check.

Try updating the firmware of the digital certificate card and reboot the device once, and see if that works.

Also, go to Preferences (Ctrl,Cmd+K) > Signature > Identities and Trusted Certificates > More > Under Digital IDs, Remove the previously added Digital ID and reconfigure it. Click on Add the Digital ID and select 'a device connected to this computer' > click Next and follow the onscreen instructions. 

Let us know how it goes.