“No preview available” error message, when trying to preview a file on the mobile app

I did look at my online account this morning and the problem files aren’t even on there!  The files are still listed on my app, still saying though “No preview available”.  I’ve used Dropbox for many years and whenever I’ve saved a new file, it will always show up on any one of my devices or my laptop.  As far as exporting, not sure what you mean, when I save it to one Dropbox it saves it no matter what device I have that I use Dropbox on.  

Thanks for your help.

Thanks for the speedy response karkness 

When I say export content, I mean to save it locally to your mobile, and try to open it that way, just to check if you get the same error there. If you could attach some screenshots of the error you get on your end, I'd most definitely appreciate it!

I may not be understanding still about exporting, but I most always have the document saved on my iPhone or iPad and then save it from that to my Dropbox.  This is the message I get though..

This is the message I get…

Hi karkness, were you able to preview these specific files using the app before? 

Have you tried uninstalling the app, rebooting the device, and installing it again?

Yes, some were files I’ve used before and they won’t open any longer, one was a new file I added the first day I had this problem.  I have updated my iPhone/iPad and deleted the Dropbox app and reinstalled it.  It’s a puzzle.  Thank you so much for trying to help though!

I share my recipes a lot, so it does make me sad that I may not be able to access all of them like I have in the past.

Thanks for the info, in order to look into this matter in more detail, I'd recommend contacting the support team for further assistance from the team.