Unexpected server response (0) while retrieving PDF

[Laazarus]

Hello,

I am trying to use this directive with my project but I am not able to view the file because I am always getting this exception Unexpected server response (0) while retrieving PDF "url"

Does anyone knows what it could be he cause of this?

Ps the server is Apache Tomcat and I have enabled cors origin filter.

Any help would be very appreciated

Best Regargs