DRM on downloaded manual for the Indoor powerwall

Minor issue here ... I like to download the install manuals for your products onto my Fire Table to take with to customer installs. I can bookmark and search etc .... better than paper manual and always the latest issue.  Most of the time this works great, but I ran into one today that gave me an error message saying the file had DRM protection and could not be viewed in Kindly app  ????   Its the 280AH indoor powerwall .... not sure if that is some weird Fire issue or something got marked accidently at creation ... I will just print the relevant page or two I want and take with, but be nice if something that could be rectified.