Then follow the step by step to perform the correction of the error "Not Found" when running the PDF generation.
Navigate to the folder 'tmp' in its publication folder. Open the file ".log", which was generated with the name of your PDF. and save your content.
Second step :
After this, open your terminal server, type "cd /publication_folder/_lib/prod/third/wkhtmltopdf/linux-i386 or linux-amd64", choose according to your version of Linux .
After this, open your terminal server, type "cd /publication_folder/_lib/prod/third/wkhtmltopdf/win".
After this, open your terminal server, type "cd /publication_folder/_lib/prod/third/wkhtmltopdf/osx".
Now, that you are in "/publication_folder/_lib/prod/third/wkhtmltopdf/OS_folder", run the command that was saved on the one step.
Will be displayed an error, it which say that is missing a library on your operational system. Perform the installation of the library applied for and try to perform the generation of the PDF again.