Error in opening file "Please try again or contact support if this error persists. (Error 401)."

[Fuad Ahmadov]

Every time, when I open the pdf file, appear error: " An error has ocurred within our system. Please try again or contact support if this error persists. (Error 401). "

Thanks

[Allain Umailin]

Hello @Fuad Ahmadov,

Thank you for reaching out to us through our Community Forums!

In order to further assist you, what build of Nitro Pro are you working with? You can find this out by clicking on 'About Nitro Pro' under the Help tab (format is  12.XX.X.XXX, e.g. 12.16.9.574) or you can go to Control Panel > Programs and Features.

Also please provide the serial number of your Nitro Pro program. This matters because our business installers are different from the online ones.

Thank you very much in advance and I am looking forward to hearing back from you.