Hi gert,
Thank you for reaching out to us.
The WebKit rendering engine relies on the QtWebKit browser for HTML to PDF conversion. Since QtWebKit has been marked as deprecated with no further updates planned, we have unlisted the WebKit packages from NuGet.org. To ensure a smoother transition, we recommend migrating to our latest Blink rendering engine. In the near future, we will officially mark the WebKit rendering engine as deprecated. We appreciate your understanding on this matter.
Regards,
Arumugam M