C3.js graphs not rendered in PDF file generated with ROTATIVA or ROTATIVAHQ

Question

I have an web site ASP.NET 4.8 MVC hosted in cloud Azure with an app plan P1v2. For two days the graphics that were rendered with Rotativa from cshtml to pdf are no longer displayed, they have disappeared. It works in localhost but not on the server.

I tried using RotativaHq, but the same result.

There is a raison? How fix it?