We are sorry for the inconvenience.
This is a known issue and our team is working on it.
Could you please share a PDF with us that you open on mobile application when this error message appears, so we can check it on our end.
Please check your private message inbox for details to send PDF.
Same issue with my phone. Problem seems to occur with any prompt or manipulation of document. Example swipe screen to turn page pops an error code, expand or reduce text or image pops error messages. Any command or browsing execution in PDF initiates an error message. This device is 8.1 with a build date of Nov 2014. Newer device on 10 with build date of Jun 2016 no issues with PDF is it hdwe specific or OS specific?
I also have Windows on a Nokia Lumia and encounter repeated, ( nearly 15 times !) error messages when I open any PDF.
my version was downloaded from the Microsoft store as well.
Is there a fix yet??
I wonder if the Windows platform has gone the same route as the 8-track.