ERROR CODE 0x400D0015

[Kandi Nissen]

I get this error code when I try to OPEN several Previously saved Nitro documents. PLEASE HELP I can't open at all 

It just says contact Nitro support for assistance.

[Allain Umailin]

Hello @Kandi Nissen,

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

In order for me to further assist you with your concern, could you please provide the following?:

-Is this a new issue or has it occurred since after installing Nitro Pro? Any changes you are aware of before this happened (e.g. Windows Updates)?
-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 13.X.X.X, e.g. 13.2.3.26) or you can go to Control Panel > Programs and Features.
-A few sample files previously saved using older version of Nitro Pro by sending me a private message (hover your mouse on top of my name 'AllainU' and select 'Message') so I can replicate it on my end. 
-Where are the files saved (local, a shared drive or an external drive) when you are trying to open? Can you check if you have the same issue when the file is saved locally?

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