As I was able to understand the issue from the given information, you are receiving error "Problem reading document (110)" when trying to save pdf after signing it using the digital signature, is this correct?
Check if an update is pending for Reader by clicking "Check for Updates" under Help menu. If there is, install the update and reboot the machine and try again.
Could you please confirm the dot version of Reader installed on the machine?
You may refer to the steps given here to: Identify the product and its version for Acrobat and Reader DC
Thank you for your reply, but it didn't solve the problem.
The error "Problem reading document (110)" when trying to save pdf after signing it using the digital signature,But not all documents will have this error, and only some documents will, so I really want to know why this happens.Because this document is important.
I'm sure I installed the latest version.
Can you save the file without signing it?