Unable to open some PDF files

I use Cryptomator with Google drive and windows 10.
-When I open some PDF files from my vault with Foxit Reader, I get “an unknown error occurred while accessing P:\folder\myfile.pdf”.
-When I try to copy the file outside the vault, I get “Error 0x800700DF: the file exceeds the limit allowed and cannot be saved”.
This PDF file is 58MB and the original version before copying it to vault is readable with no problem.
Any idea?
Many thanks

Hey and welcome to the Cryptomator Community :slightly_smiling_face:,

Is this problem reproducible on your device? Also happens with different PDF files or just this one?
I assume you’re using WebDAV to mount the vault into the system? You can check this under Cryptormator settings → Virtual Drive

thank you SailReal,
Yes, the problem is reproducible on all my devices. And it happens every time with several PDFs (over 50MB). And yes, the vault is mounted as WebDAV.
Thanks again for helping.