Premium Security Bank Mode blocks some of my Dropbox PDF files

I have purchased Ultimate but not yet installed it on this computer. On the one I have installed it I cannot even see the files on Secure Browser. Though if I share them on Facebook I can see them.
Why no block warning? Both Windows 10.

Hi,

Can you please provide screenshots and more details to clarify the issue?
https://support.avast.com/en-ww/article/Create-screenshot

Thanks, I’ve now discovered that files uploaded through Avast Secure Browser to Dropbox can only be seen in the same browser on the same computer. But if I use the same computer and Chrome for the upload the problem is fixed and the files can even be seen on Avast Secure Browser anywhere.