Unable to sign pdf

Hello,

Thank you for reaching out.

The feature that you are trying to use to add a signature is greyed out because either there is a signature field added in the document. If yes, please click on the field to add a signature.

Or the file is locked and you cannot make any changes to that file.

Let us know if you have any questions.

Thanks,

Meenakshi

May be that the signature has locked the document.