Error google docs pdf viewer

Error when consulting a document through the Google docs PDF file viewer which I have implemented within my platform and now when the traffic is verified by its services it no longer works

Working PDF example of another accommodation:

Example with error hosted on domain protected by Cloudflare
https://demo.edubox.app/core/index.php/C_clases_lecciones_file_viewer_controlador/show?url=/files/upload/profesor/clases/recursos/lecciones/archivos/1374_fileAttached_1__04_02_22_21_05_02___92755.pdf

I need help with this matter

From now on I am very grateful for the help provided

Hey then redirect to the Google doc page only .

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