Libresign Issue (Cannot sign with QR code)

Hi

We have following setup

Nextcloud 23.0.4
OS: Debian 11
Libresign: 7.1.1
php-8.1-Imagick: 3.7.0-4+0~20230701.41+debian10~1.gbpbf7e27
imagemagick: 8:6.9.11.60+dfsg-1.3+deb11u1
ghostscript: 9.53.3~dfsg-7+deb11u5

Once document is signed, all seems well. But when we view signed document there is no QR code or any thing that’s related to document signing.

Please suggest