Hello,
Please do these tests:
· Generate the most simple DOCX, a single text, and then sign it (all in the same script).
· Use a standalone script to sign your DOCX (just to test it standalone). Maybe the DOCX file is not correctly closed by PHP when createDocx is called and then sign docx try to open it in the same script?
If the second test doesn't work, please send to contact[at]phpdocx.com the DOCX you are trying to sign and the dev team we'll check it.
Regards.